Wednesday Poster Sessions
We4.P.1
PMD-Insensitive Chromatic Dispersion Monitoring
N Liu , W-D Zhong, Nanyang Technological University , Singapore , Y J Wen , Y Wang, Institute for Infocomm Research , Singapore
This paper investigates the influence of PMD on the measurement of chromatic dispersion (CD), proposes and experimentally demonstrates a PMD-insensitive CD monitoring technique using the optically sideband filtering and RF power ratio detection.
We4.P.2
16-Channel x 1.25 Gbit/s External Cavity Laser Module for WDM-PON OLT Source by Silica PLC Hybrid Integration
S H Oh , J U Shin, S H Park, Y J Park, Y T Han, D J Kim, S Park, S B Kim, H K Sung, Y S Baek, K R Oh, Electronics and Telecommunications Research Institute , South Korea , C H Park, Wooriro Optical Telecom Company, South Korea , W Y Hwang, Lightron Fibre Optic Devices Inc, South Korea
We successfully fabricated a very compact 16-channel 200 GHz-spacing transmitter module for WDM-PON OLT source.The transmitters are composed of reflection gratings and hybridly integrated reflective SOA's(RSOA's) to construct 16-channel external cavity lasers(ECL's) on the PLC chip. This module operates successfully with a total throughput of 1.25 Gbit/s over 20 Km transmission.
We4.P.3
10 Gb/s InAs/InP(001) Quantum Dot Lasers Operation on C-Band up to 75°C
B Dagens , F Lelarge, L Morel , D Make , B Rousseau , O Le Gouezigou, J G Provost , F Poingt , L Le Gouezigou , F Pommereau , J Landreau, A Accard , B Thedrez , Alcatel Thales III-V Laboratory , France
10 Gb/s operation at 1.55µm of an InAs / InP (001) dots-in-a-well buried ridge stripe Fabry-Perot laser is demonstrated for the first time, in the temperature range 25-75°C.
We4.P.4
Geometric Freedom for Constructing Variable Size Photonic Bandgap Structures
J Zarbakhsh , F G Isfahani, Veronika Rinnerbauer, Kurt Hingerl, Universität Linz, Austria, J Chaloupka, Masaryk University Brno , Czech Republic
We study the effects of geometrical parameter variation on the properties of photonic crystals. We show that long-range periodicity is not necessary for the formation of bandgaps, which leads to new flexible photonic crystal designs.
We4.P.5
Distributed Fibre-Optic Temperature Sensing Using Rayleigh Backscatter
D K Gifford , B J Soller , M S Wolfe , M E Froggatt , Luna Technologies , United States
We present a novel technique for distributed fibre-optic temperature sensing based on measuring the temperature-dependent spectral shift of the Rayleigh backscatter signal along an optical fibre. Swept-wavelength interferometry is used to measure the Rayleigh backscatter.
We4.P.6
Supercontinuum Generation in Large Mode-Area Microstructured Fibres
G Genty , T Ritari , H Ludvigsen , Helsinki University of Technology , Finland
We demonstrate supercontinuum generation in large mode-area microstructured fibres by launching ns pulses from a Q-switched Nd:YAG laser into the fibre. The continuum is smooth, covers all the telecom transmission bands and is well-suited for characterisation of WDM components.
We4.P.7
Dispersion-Managed Fibre (DMF): Experimental & Economic Evaluation
M Gunkel, D Breuer, H Reiner, H Cremer, Deutsche Telekom, Germany, R Freund, C Caspar, F Raub, Fraunhofer-Institute for Telecommunications, Heinrich-Hertz-Institut, Germany, D Mirto, L Nederlof, S Ten, Corning Incorporated, Science and Technology, United States
We report an experimental comparison of 40 Gbit/s transmission over DMF and G.652 fibres and find a 30% reach advantage for DMF. Cost modelling for a generic German backbone network quantifies DMF economic advantage.
We4.P.8
Waveguide-Type Saturable Absorber Based on Carbon Nanotubes
K Kashiwagi , S Yamashita, The University of Tokyo , Japan , Y Nasu , NTT Corporation , Japan , H Yaguchi , C S Goh, S Y Set, Alnair Labs Corporation , Japan
We propose and demonstrate a waveguide-type saturable absorber based on carbon nanotubes (CNTs). It was applied to a mode-locked fibre laser. The results indicate the possibility of realizing integrated CNTs device for ultrafast systems.
We4.P.9
Monolithic Integration of Electroabsorption Modulator with Spot Size Converter Based on Dual Waveguide Structure
Y-S Kang, S-B Kim, Y-D Chung, J Kim, ETRI, South Korea
We demonstrated a spot size converter integrated electroabsorption modulator associated with dual waveguide structure, which showed the optical insertion loss of –6 dB, the extinction ratio of 21 dB and 3-dB bandwidth of > 30 GHz in E/O response.
We4.P.10
Coding Gain of FEC Encoded 21.42Gb/s RZ-DQPSK Using an Electrical Differential Quaternary Precoder
M Serbay , W Rosenkranz, University of Kiel , Germany, C Wree, Discovery Semiconductors, Inc. , United States , A Schöpflin, C-J Weiske, P Krummrich, P Leisching, Siemens AG COM , Germany, D van den Borne, S L Jansen, G D Khoe, Eindhoven University of Technology , The Netherlands
We report a measured gross coding gain of 6.8dB for 21.42Gb/s RZ-DQPSK using standard FEC in combination with differential precoding. Furthermore we show that RZ-DQPSK has approximately a 2dB higher FEC coding gain than RZ-DPSK.
TOP OF PAGE We4.P.11
Introduction to the Concept of Nonlinear Diffusion Bandwidth
H Louchet , K Petermann , Technische Universität Berlin , Germany, A Robinson , R Epworth, Nortel Networks , United Kingdom
We propose a universal characterization of intra-channel nonlinear effects in multi-span transmission systems by introducing the concept of “nonlinear diffusion bandwidth”: We show that transmission lines having identical “nonlinear diffusion bandwidth” generate similar nonlinear degradations.
We4.P.12
InP-Based Photonic Integrated Circuit Triplexer for FTTP Applications
V Tolstikhin , F Wu, A Densmore, K Pimenov, Y Logvin, MetroPhotonics Inc. , Canada
An InP-based monolithically integrated triplexer chip comprising 1555nm/1490nm/1310nm WDM, video/data receiver and transmitter monitor photodetectors, along with waveguide circuitry, is presented. A high-performance component with a footprint size of only 1mm´5.5mm does not require active alignment and is compatible for flip-chip mounting on a silicon optical bench.
We4.P.13
Wavelength Tuneable Reconfigurable Optical Interconnection Network for Shared-Memory Machines
W Heirman , J Dambre, J Van Campenhout, University of Ghent , Belgium , I Artundo , D Carvajal, L Desmet, C Debaes, H Thienpont, Vrije Universiteit Brussel , Belgium
Novel, cheap optical components allow for reconfigurable interconnection networks inside multiprocessor systems. In this paper, we introduce some of these components, their limitations, and present simulations that show the resulting speedup of these multiprocessor systems.
We4.P.14
3 Gbit/s Data Transmission with Monolithically Integrated Optical Transceiver Chips For Very Short Reach Applications
M Stach , L Stöferle, F Rinaldi, R Michalzik, University of Ulm , Germany
We present data-transmission experiments at 3 Gbit/s with VCSELs and MSM-photodiodes as parts of a GaAs-based monolithically integrated transceiver-chip which is well suited for low-cost and compact bidirectional optical interconnection in mobile systems or home-networks.
We4.P.15
Resonant Coupling for Distributed Filtering in an Optical Fibre
R T Bise , J M Fini , M F Yan , A D Yablon, P W Wisk, OFS Laboratories , United States
Index-matched coupling between core and cladding modes has been designed for an optical fiber by incorporating high-index rings into the cladding. Measurements show resonant coupling at index-matched wavelengths enabling distributed filtering over specific wavelength regions.
We4.P.16
Self-Optimisation and Stabilisation of Delayed MZI in DPSK Receiver
Y S Jang , H Park, K J Kim, Electronics and Telecommunications Research Institute , South Korea
We propose a self-optimization and active stabilization method of 1-bit delayed MZI for NRZ-DPSK. Experimental results show that error free performance was maintained when there was carrier optical frequency variation of upto ~10% of data rate.
We4.P.17
Fully Active Optical Backplane System
I K Cho, ETRI & Pusan National University , S Ahn, W J Lee, S P Han, ETRI , South Korea , K Shin, Samsung Electro-Mechanics Company , South Korea, K B Yoon , Kyungpook National University , South Korea , M Y Jeong , Pusan National University , South Korea , H H Park , ICU , South Korea
A fully active optical backplane system with two processing boards and an optical backplane is developed. As a board-to-board interconnect component, optical slots was fabricated and the system successfully was tested at 10 Gb/s data rate.
We4.P.18
All-Optical Extinction Ratio Enhancement of a 160-GHz Pulse Train Using a Saturable Absorber Vertical Microcavity
D Massoudre , J L Oudar , LPN-CNRS , France , J Fatome, S Pitois , G Millot, LPUB-CNRS, France , J Landreau , J Decobert, J L Oudar, Alcatel-Thales III-V Labratory, France
A vertical-access passive all-optical gate has been used to improve the extinction ratio of a 160-GHz picosecond pulse train at 1555 nm. An extinction ratio enhancement of 6 dB is observed within a 8-nm bandwidth.
We4.P.19
Implementation of Local Re-broadcasting and LAN Services over an Ethernet Passive Optical Network
TC Jayasinghe , University of Melbourne & National ICT Australia Ltd, Australia , C J Chae , National ICT Australia Ltd, Australia
A novel technique to implement value-added services over an Ethernet passive optical network is proposed and optical link performances of 155-Mb/s LAN, 50-Mb/s digital TV re-broadcasting, and 750-Mb/s downstream delivery are experimentally evaluated.
We4.P.20
Distributed Gain Monitoring in a Raman Amplifier Based on a Germania-Glass-Core Silica-Glass-Cladding Optical Fibre
G Ravet , M Wuilpart, M Blondel, P Megret, Faculte Polytechnique de Mons , Belgium , A A Fotiadi, Faculte Polytechnique de Mons , Belgium & Ioffe Physico Technical Institute of Russian Academy of Sciences, Russia , V M Mashinsky, E M Dianov, Russian Academy of Sciences, Russia
Gain monitoring OTDR-technique recently demonstrated by some of us is now applied forcharacterizing a short Raman amplifier. Spectrum/power-pump/signal mapping of Raman gain profile in 100-mlong germania-glass-core fibre with a record gain ~260dB/km/W is reported.
TOP OF PAGE We4.P.21
First Single-Fibre Bi-Directional XFP Transceiver for Optical Metro/Access Networks
T Yoshida , S Kimura, K Kumozaki, T Imai, NTT Corporation , Japan
We have developed the first single-fibre bi-directional XFP transceiver for optical metro/access networks. By using a differential signal line to the transmitter optical subassembly, we realize a 10Gbit/s bi-directional module with low electrical crosstalk. We confirm crosstalk suppression by FDTD simulations. The developed XFP module yields signals with good eye opening. We obtain the quite low sensitivity penalty of 0.3dB with simultaneous operation of the transmitter and receiver.
We4.P.22
Integrated MZI Based All-Optical Clock and Data Recovery for Asynchronous Variable Packet Length Traffic
D Tsiokos , P Bakopoulos, O Zouraraki, H Avramopoulos, National Technical University of Athens , Greece, G Maxwell, A Poustie, Centre for Integrated Photonics , United Kingdom
We demonstrate a compact, all-optical, packet Clock and Data Recovery circuit that uses integrated MZIs. Clock is acquired within 2 bits irrespective of packet length and phase alignment. Error-free operation is demonstrated at 10 Gb/s.
We4.P.23
Wide Temperature (25ºC – 85ºC), Coolerless Operation of 100Gb/s DWDM Transmitter Photonic Integrated Circuit
R Nagarajan , M Kato, C H Joyner, R P Schneider Jr, J Bäck, A G Dentai, T Desikan, V G Dominic, P W Evans , M Kauffman , D J H Lambert, S K Hurtt , A Mathur, M L Mitchell, M J Missey, S Murthy , A C Nilsson, F H Peters, J L Pleumeekers , R A Salvatore , R B Taylor, M F Van Leeuwen, J Webjorn , M Ziari , S G Grubb , D Perkins , M Reffle, D G Mehuys , F A Kish , D F Welch , Infinera , United States
A 10-channel dense wavelength division multiplexed photonic integrated circuit is demonstrated that transmits data at 10Gbit/s per channel for an aggregate data transmission rate of 100Gbit/s, operating without temperature stabilization between 25ºC and 85ºC.
We4.P.24
A Broadcast and Select WDM-PON and its Protection
Z X Wang , B Zhang, C Lin , C K Chan , The Chinese University of Hong Kong , China
A broadcast and select WDM-PON is proposed and experimentally demonstrated for both dedicated and broadcast services. Group protection concept is used to increase the network reliability at relatively low cost.
We4.P.25
Double-Cavity Raman Fibre Laser with Improved Tolerance against High-RIN Pump Lasers
M Krause , R Stanslovaityte, S Cierullies , H Renner , E Brinkmeyer, Technische Universität Hamburg-Harburg , Germany
We demonstrate a double-cavity Raman fiber laser with a tunable low-noise operating point, where simulations show much higher tolerance against noisy pump lasers than the corresponding single-cavity Raman fiber laser.
We4.P.26
Double-Pumped Parametric Amplifier with Flat Gain Over 47 nm Bandwidth Using a Conventional Dispersion Shifted Fibre
J M Chavez Boggio , J D Marconi, H L Fragnito, State University of Campinas , Brazil
We report a double-pumped parametric amplifier with 37±1.5 dB gain over a 47-nm bandwidth using a conventional dispersion-shifted fibre. The average gain and the gain uniformity are limited by PMD and variations of ? 0 .
We4.P.27
Development of an Ultra High-Secure and 1 Gbps Optical Transmission System Using Quantum Noise
Diffusion Cryptography
M Fuse , S Furusawa , T Ikushima , Matsushita Electric Industrial Company Ltd , Japan , O Hirota , Tamagawa University , Japan
We demonstrate high-speed (1 Gbps) data encryption and optical transmission using ‘Quantum Noise Diffusion Cryptography'. M-ary amplitude modulation scheme over 100 levels will enhance the quantum noise effect on encrypted data and prevents eavesdropping.
We4.P.28
OPLEAF High Density Fibre Array for Minimized Lateral Device Spacing Optical ICs
T Sonobe , N Hiroi, Namiki Precision Jewel Company Ltd , Japan , M Takenaka, Y Nakano, H Fujita, University of Tokyo , Japan
We propose an OPtical LEAd Frame (OPLEAF) that serves as the interface between optical fibres and high density optical ICs. OPLEAF allows significant size reduction of optical ICs.
We4.P.29
Laterally Coupled DFB Lasers Based on InAs/InP-QDash Structures for Broadband Applications
W Kaiser , K Mathwig, S Deubert , A Somers , A Forchel, University of Wuerzburg , Germany , J P Reithmaier , University of Kassel , Germany , O Parillaud, M Krakowski, Thales Research and Technology , France , D Hadass, V Mikhelashvili, G Eisenstein, Technion , Israel , M Legge , nanoplus, Nanosystems and Technologies GmbH , Germany
Laterally coupled DFB lasers based on quantum dashes were fabricated by FIB lithography. CW-powers above 30 mW, high SMSRs, a modulation bandwidth of 7.6 GHz and singlemode emission from 1.5 to 1.9 µm were demonstrated.
We4.P.30
10 Gbit/s Terminal Solution for Transmission over 600km
L Zheng , V Goel, D Yang, G Barbarossa, Avanex Corporation , United States
This paper demonstrates error free transmission of 10Gbit/s over 600 km SMF-28 fiber using transponder with micro-optic based optical dispersion compensation (ODC). This provides a cost-effective upgrade solution of 2.5 Gbit/s transmission systems to 10 Gbit/s over 600km links without inline modifications.
TOP OF PAGE We4.P.31
Type IIA Gratings Recorded in B-Ge Codoped Optical Fibre Using 213nm Nd:YAG Radiation
S Pissadakis, M Konstantaki , FORTH-IESL , Greece
Type IIA photosensitivity was observed during Bragg grating recording in B-Ge codoped silicate fibre using 213nm, 150ps Nd:YAG radiation. Index changes of the order of 10-3 were obtained for exposures of accumulated dose of 4kJ/cm2.
We4.P.32
A Spectral Channel Order Preserving Technique for Wavelength Conversion Based on FWM and its Application in Label Switching Optical Network
J Yu, Z Jia , Y Yeo , G K Chang , Georgia Institute of Technology , United States
We have experimentally demonstrated, for the first time, a FWM-based wavelength conversion that does not invert the spectral order of consecutive wavelength channels.
We4.P.33
High Wavelength Accuracy of a Full C-band External Cavity Wavelength Tunable Laser Using an Intracavity Wavelength Reference Etalon
J De Merlier, K Mizutani, S Sudo, S Watanabe, K Sato, K Kudo, NEC Corporation, Japan
We experimentally demonstrate high wavelength accuracy of less than 1 GHz for a full C-band external cavity wavelength tunable laser without wavelength locker outside the cavity. Guidelines to further improve the accuracy are also proposed
We4.P.34
Transparent Interconnection between Metro-Core and Metro-Access Network by using SOA-MZI Based 2R Wavelength Converter
H S Chung , R Inohara , K Nishimura, M Usami , KDDI R&D Labs , Japan
We demonstrate transparent interconnection of metro-core and metro-access network by using SOA-MZI based 2R wavelength converter. 10-Gb/s EML signal transmission utilizing two SOA-MZI's and 120 km of SMF is successfully demonstrated.
We4.P.35
Active and Passive Mode-Locking in Buried Ridge Mode-Locked Quantum Dots Fabry-Perot Semiconductor Lasers
J Renaudier , Alcatel Thales III-V Lab , France & ENST , France , R Brenot , B Dagens , F Lelarge , B Rousseau , O Legouezigou , F Poingt , F Pommereau , A Acard , G-H Duan , Alcatel Thales III-V Lab , France , C Gosset , J-L Oudar , LPN, CNRS , France , P Gallion , ENST , France
Both passive and active mode-locking have been demonstrated in single-section quantum dots Fabry-Perot semiconductor lasers without saturable absorber, generating pulses at 28 GHz repetition frequency with one picosecond pulse width.
We4.P.36
Fast, Low-Cost Method for Control of Gain and Tilt Transients in a Forward-Pumped Raman Ampifier
X Zhou , M D Feuer, M Birk , AT&T Labs - Research , United States
We propose and experimentally verify a new dynamic gain control technique for a forward-pumped Raman amplifier. Using this technique, we demonstrate sub-microsecond tilt transient control capability without using a channel spectral monitor.
We4.P.37
Super-Compact Monolithically Integrated Polymer-Based Reconfigurable Optical Add-Drop Multiplexer (ROADM)
H H Yao , C Zawadzki , F Beyer , O Radmer , N Keil , Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut , Germany, H-J Lee , Zen Photonics Co. Ltd , South Korea
Monolithically integrated polymer-based ROADM has been fabricated using super-high refractive-index contrast (?n=0.020) polymers. The measured insertion loss is < 17 dB, the crosstalk is < -22 dB and the chip-size is 20 x 30 mm.
We4.P.38
Characterisation of Equalised 10-Gb/s Multimode Fibre LAN Links Using Transverse 7-Tap Analog FIR filter in 0.13-um CMOS
A Risteski , University of Skopje , Macedonia , S Reynolds , J Tierno , L Schares , S Gowda , J A Kash , P Pepeljugoski , IBM TJ Watson Research Center , United States
BER and ISI measurements of over 600 equalised 300-m long 10-Gb/s MMF links using a 7-tap analogue-FIR filter show offset launch is preferred for OM1 fibres, while centre launch is preferred for OM3 fibres.
We4.P.39
Investigation of Data Streams and Highly Efficient Interconnection of Storage Area Networks over Distances of 1000 km
A Ehrhardt , W Jacobi , T-Systems International , Germany
For safety reasons produced data must be stored at least twice with sufficient distances between storage systems. The temporal characteristics of data streams between computer centres were measured for new communication services and efficient network utilisation.
We4.P.40
Directly-Modulated Athermal Transmitter for Uncooled WDM Systems
Y Liu , J D Ingham , A Wonfor , A R Davies, R V Penty , I H White , University of Cambridge , United Kingdom
A directly-modulated tunable DBR laser is demonstrated as an athermal transmitter for uncooled WDM systems. 4×3.125Gb/s modulated wavelength channels with 1nm spacing and 50ºC temperature span are transmitted over 50km.
TOP OF PAGE We4.P.41
A Single-Fibre Bi-directional Self-Healing WDM Metro-Ring Network with Bi-directional OADM
X F Sun , Z X Wang , C K Chan , C L Lin , L K Chen , The Chinese University of Hong Kong , China
We propose and demonstrate a single-fibre bi-directional WDM self-healing ring network with simple bi-directional OADM. By employing our proposed alternate-path switching scheme, the bi-directional traffic can be restored promptly under single fibre failure.
We4.P.42
Spectrally Efficient QPSK Homodyne Detection Using a Pilot Carrier beyond 1 bit/s/Hz
T M Miyazaki , National Institute of Information and Communications Technology , Japan
Spectrally efficient QPSK self-homodyne detection using a pilot-carrier at 20 Gbit/s was successfully demonstrated. Error-free operation (log(BER) < -9) was confirmed at a spectral efficiency beyond 1 bit/s/Hz without using an optical phase-locked loop.
We4.P.43
All-Optical Wavelength Conversion in Silicon Wire Waveguides
T K Liang , L R Nunes , M Tsuchiya , NICT , Japan, H K Tsang , CUHK , China, D van Thourhout , P Dumon , R Baets, W Bogaerts , University of Ghent , Belgium
We describe the use of two-photon absorption in submicron silicon wire waveguides for all-optical wavelength conversion by cross-absorption modulation scheme. Optical pulses at 1GHz repetition rate have been successfully converted from 1550nm to 1544nm.
We4.P.44
Thermal Properties and Passband Improvement of High Index Contrast Micro-Ring Resonator by Phase Error Correction
Z Wang , Y J Chen , University of Maryland Baltimore County , United States
Thermal properties of individual device parameter of high index contrast (HIC) lattice micro-ring resonators were studied for the first time using our phase error measurement. Improvement of passband by fine-tuning was also demonstrated.
We4.P.45
Relative-Intensity-Noise Transfer in Forward-Pumping Raman Amplification Using a Raman Fibre Laser Pump
C Martinelli , L Lorcy , D Mongardien , D Bayart , Alcatel , France
Forward-Raman-pump-to-signal RIN transfer using a Raman fibre laser pump is measured and analysed. For the first time, we point out the necessity of considering the polarisation dependence of Raman gain in the RIN transfer calculation.
We4.P.46
Error-Free Unrepeatered Transmission of 8x10.709Gb/s RZ-DPSK Signal over 310km Standard SMF with Bidirectional Raman Pumping
J Mo , J Chen , Y Wang , Y J Wen , Nanyang Institute for Infocomm Research , Singapore , G T Zhou , K Xu , Beijing University of Posts and Telecommunications , China , C Lu , Nanyang Institute for Infocomm Research , Singapore & Nanyang Technological University , Singapore
Error free 8-channel single-span transmission is demonstrated over 310km standard SMF using RZ-DPSK format and birectional Raman pumping, without applying FEC and remote-pumping techniques.
We4.P.47
A New π/2-Shift-BPSK Signal by Superstructure Fibre Bragg Grating En/Decoder
K Sasaki , M Sarashina , S Kobayashi , H Tamai , A Nishiki , T Ushikubo , Oki Electric Industry Co. Ltd Japan
A weak interference π/2-Shift-BPSK encoding and high contrast autocorrelation peak are demonstrated using a novel superstructure fibre Bragg grating en/decoder. The uniform reflectivity of encoders with different code pattern has been achieved by newly developed π/2-Shift-BPSK encoding.
We4.P.48
High-Speed 1.56 um Asymmetric Fabry-Perot Modulator/Detector (AFPMD) for Radio-Over-Fibre Applications
C P Liu , C H Chuang , A J Seeds, University College London , United Kingdom , S Karlsson , O Kjebon , R Schatz , Y Yu , Royal Institute of Technology , Sweden , T Tsegaye , Formerly with Optillion , Sweden , A B Krysa , J S Roberts , EPSRC National Centre for III-V Technologies , United Kingdom
We have fabricated modulator/detectors with modulation bandwidths exceeding 15GHz, the highest yet reported for InGaAsP/InGaAsP MQW AFPMDs. Wavelength dependence of the modulated output power at microwave frequencies is reported for the first time.
We4.P.49
Strong Self-Phase Modulation in Low Loss As 2 S 3 Waveguides
Y Ruan , B Luther-Davies , A Rode , W Li , Australian National University , Australia
A large phase shift of 4.7 p induced by strong self-phase modulation (SPM) has been observed when 7ps pulses at 1.53µm propagate through a 6cm long, low-loss (0.2 dB/cm), small core As 2 S 3 waveguide fabricated by dry etching.
We4.P.50
Multi-QoS Traffic Transmission Experiments on OBS Network Testbed
H Guo , J Wu , X Liu , J Lin , Y Ji , Beijing University of Posts and Telecommunications , China
This paper reports a Multi-QoS traffic transmission experiment on OBS network testbed, and experimental results verify QoS provision in this testbed. Moreover, delay penalty and correlation effect on TCP transmission are also observed.
TOP OF PAGE We4.P.51
Enhancement of Lightpath Establishing Capability for Dynamic Traffic Grooming
B Chen , W D Zhong , S K Bose , Nanyang Technological University , Singapore
We apply the saturated cut method to enhance the lightpath establishment capability of previously reported traffic grooming policies. The simulation results show that the use of the saturated cut method can improve blocking performance significantly.
We4.P.52
Time Domain Single Side Pulse Interference Quantum Key Distribution Scheme
O L Guerreau, S W McLaughlin, F J Malassenet, Georgia Institute of Technology, United States, J-M Merolla, GTL-CNRS Telecom, France
A new time domain interference scheme, called SSP, is presented, similar to the SSB scheme in the frequency domain. The embedded detection of a strong reference makes it secure against PNS attacks.
We4.P.53
Evaluation of Phase Shift in a Si-Waveguide with a Ferroelectric Liquid Crystal Cladding Using Mach-Zehnder Interferometer
K Nakatsuhara, Y Inami , T Nakagami , Kanagawa Institute of Technology , Japan
We fabricated a Mach-Zehnder interferometer with FLC-clad waveguides on a silicon-on-insulator wafer and evaluated the phase shift due to the FLC at a wavelength of 1550nm. The evaluated shift difference was 0.45 pi/mm.
We4.P.54
Integrated Performance Monitoring, Performance Maintenance, and Failure Detection for Photonic Regenerators
G Lakshminarayana , R M Mu , H Wang , B Stefanov , B Dave , J Sarathy , Alphion Corp. , United States
We have developed a novel technique, based on photocurrent measurement in an integrated photodetector, to stabilize the output of a P2R device and trigger restoration in the event of a failure.
We4.P.55
Optical Amplifier Noise Figure Measurement by All-Fibre Optical Homodyne Tomography
P Martelli , S M Pietralunga , R Siano, CoreCom , Italy , L Ranzani , M Martinelli, CoreCom , Italy & Politecnico di Milano, Italy
An all-fibre optical homodyne tomography apparatus is realized for reconstructing the photon statistics of the superposition between optical noise and signal. This apparatus is employed to measure the noise figure of an optical amplifier.
We4.P.56
30 dB Long-Period Fibre Grating Inscription by High-Intensity Femtosecond 352 Nm Laser Pulses
M Dubov , I Bennion , Aston University , United Kingdom , S A Slattery , D N Nikogosyan , University College Cork , Ireland
We describe long-period grating inscription in hydrogenated telecom fibres using high-intensity 352 nm laser pulses and show that this technique allows us to fabricate very strong (30 dB) high-quality fibre gratings via three-photon absorption.
We4.P.57
Surface Mount Connectors with Three-Dimensional Waveguide Arrays for Board-to-Board Optical Interconnects
S Hiramatsu , M Kinoshita , O Ibaragi , Association of Super-Advanced Electronics Technologies (ASET) , Japan
Novel waveguide connectors were demonstrated. Fabricated connectors feature three-dimensional waveguide arrays with two-dimensionally integrated optical I/Os and compatibility with surface mount technologies. Using Tx and Rx connectors, 10-Gbps/ch transmission performances were successfully obtained.
We4.P.58
Improving Broadcast Video Quality in IEEE 802.3 EPONs
S A Thomas , Wave7 Optics , United States
The IEEE 802.3ah EPON idle pattern can create significant interference with broadcast video. This paper outlines a technique for reducing this interference by modifying the idle pattern in a way fully compliant with the standard.
We4.P.59
Fibre Nonlinear Threshold Comparison of SMF and NZDSF types on Binary 43Gb/s Modulation Formats
A Klekamp , R Dischler , W Idler , Alcatel SEL AG , Germany
We compared experimentally the maximum fibre input power of SMF, TeraLight and TrueWave fibres (single span) on 43Gb/s ASK/DPSK formats, covering NRZ and RZ formats. At DPSK SMF yields highest fibre input power and highest pre-dispersion tolerance.
We4.P.60
10Gb/s Data Transmission with a 1.3µm InGaAs Quantum Dot Laser
Y Chu , R Penty , I H White , University of Cambridge, United Kingdom , M Kuntz , G Fiol , M Lammlin , D Bimberg , Tech Univ Berlin, Inst Festkorperphys , Germany , C Schubert , Fraunhofer-Institute for Telecommunications, Heinrich-Hertz-Institut , Germany, A Kovsh , NL Nanosemicond GmbH , Germany, A Jacob , A Unbach , U2T Photon AG , Germany
Error-free 10Gb/s data transmission using an InGaAs QD-laser over 4km single-mode fibre and 300m multi-mode fibre is demonstrated for the first time. The spectral linewidth of the QD-laser is the dominant limitation on transmission distance.
TOP OF PAGE We4.P.61
Comparison of Different Labels in VSB Payload Scheme for All Optical Label Switching Network
H W Chen , M H Chen , S Z Xie , B K Zhou , Tsinghua University , China
The vestigial sideband (VSB) payloads with different wavelength labelling schemes are experimentally demonstrated. The minimum 20dB channel bandwidth of optical signal is 0.40nm in 43Gb/s system which confirms the payload power penalty less than 1dB.
We4.P.62
Optical Frequency Sweep Technique Using Single Sideband Modulation
T Kawanishi , T Sakamoto , M Izutsu , National Institute of Information and Communications Technology , Japan
We demonstrated optical frequency sweep using optical single sideband modulation technique, where the frequency shift range was 2GHz-10GHz. Undesired sidebands due to electric phase errors can be compensated by synchronised bias control.
We4.P.63
2.5Gbps Operation of 1.55µm Quantum Dot Laser
D K Oh , J H Lee , J S Kim , S U Hong , B-S Choi , H-S Kwack , ETRI , South Korea
An 1.55 µm InAs quantum dot laser on the InP(100) substrate was operated under continuous wave current at room temperature and had a high characteristics temperature over 150K. The bandwidth of f-3dB~3GHz was measured with the good “Eye” pattern under 2.5Gbps data transmission.
We4.P.64
All-Fibre Passively Q-Switched Laser by a Symmetrical Nonlinear Optical Loop Mirror with Nonlinear Polarisation Potation
Y J Song, L Zhan, J H Ji, Y X Xia, Institute of Optics and Photonics, Shanghai Jiao Tong University, China
We experimentally demonstrate an all-fiber passively Q-switched erbium fiber laser by the symmetrical nonlinear optical loop mirror with nonlinear polarization rotation. And this Q-switched laser has the all-fiber nature.
We4.P.65
Novel Two Simultaneous FSR Tunabe Microwave Photonic Filter Using a Hi-Bi Chirped Grating in Sagnac Loop
Y D Gong, J H Ng, C Lu, Institute for Infocomm Research, Singapore, G X Ning, H Dong, P Shum, S Aditya, Nanyang Technological University, Singapore , J Wu, K Xu, OCLT, Beijing University of Posts and Telecommunications, China
We propose a novel, continuously tunable, photonic microwave notch filter which can yield two values of FSR simultaneously. It uses Hi-Bi linearly chirped fibre grating in a Sagnac loop. Measured results show good notch rejection.
We4.P.66
Dynamic Characterisation of UV-Induced PMD and PDL in Fibre Bragg Gratings
P Lu , D Waddy , S Mihailov , H Ding , Communications Research Centre Canada , Canada
Using a fast polarimeter, the growths of PMD and PDL in FBGs during FBG inscription are characterised and the changes in birefringence of the effective mode index and index modulation are analysed with coupled-mode theory.
We4.P.67
Multi-Wavelength Ethernet Passive Optical Network with Efficient Utilisation of Wavelength Channels
C J Chae , NICTA Victoria Laboratory , Australia
An Ethernet passive optical network accommodating multiple shared wavelengths is proposed along with a dynamic bandwidth allocation scheme. The principle of operation is experimentally demonstrated and the optical link performance is evaluated at 2.5 Gb/s data rate.
We4.P.68
Hole Emitter Whispering Galleries of Photonic Quantum Ring
O D Kwon , M J Kim , S-J An , D K Kim , J H Yoon, Y C Kim, Pohang University of Science & Technology, South Korea , S E Lee , Nanolaser Inc. , South Korea
Hole whispering gallery lasers from a 3D semiconductor microcavity exhibit micro-ampere thresholds, potentially reducible toward the nano-ampere operation, due to the photonic (de Broglie) quantum corral effect imposing a ?/2 period transient ordering upon the photonic quantum rings (PQRs) of imminently recombinant carriers. Cooperative small hole arrays like 256x256 quantum ring emitters turn out to be very promising for constructing practical dense electro-pumped mega-to-giga emitter chips.
We4.P.69
The Integration of Modulators and Multiplexers on Silica Planar Lightwave Circuits for WDM-PON
R Ridgway , D Nippa , D Schoellner , R Higgins , Optimer Photonics Inc. , United States
An integrated optical device comprising two arrayed waveguide gratings and an electrooptically-clad silica waveguide modulator array is shown to provide multiple modulated optical signals from a single broadband optical source.
We4.P.70
Polarisation-Independent Waveform Monitoring with Two-Photon Absorption in Si-APD in High-Speed Transmission Systems
C Tian , S Kinoshita , Fujitsu Laboratories of America, Inc. , United States
We have proposed and demonstrated the polarisation-independent and bit-rate independent monitoring of waveform distortion caused by chromatic dispersion in high-speed transmission system. The polarisation dependence is reduced from ±25% to less than ±4%.
TOP OF PAGE We4.P.71
Performance Evaluation and Demonstration of Light-trails in Shared Wavelength Optical Networks (SWONs)
A Gumaste , P Palacharla , T Naito , Fujitsu Laboratories of America , United States
Light-trails are a promising candidate for grooming of traffic in the optical layer. We investigated the performance of light-trails via theory, simulation and experiment focusing on its efficiency.
We4.P.72
Optimisation of S-band, C-band and L-band DFB Lasers by the Reduction of Internal Loss
A Matsumura , T Kato , Sumitomo Electric Industries, Ltd , Japan
DFB lasers from S-band to L-band showed the low threshold currents (typ. 27 mA) and the high slope efficiencies (typ. 0.27-0.33 W/A) at 85 °C. These performances are achieved by reducing the internal losses in these bands.
We4.P.73
Light Amplification at 650nm in a Polymer Waveguide with Dye-Doped Cladding
M A Reilly , B Coleman , E Y B Pun , R V Penty , I H White , University of Cambridge , United Kingdom , M C Ramon, R Xia , D D C Bradley , Imperial College of Science, Technology and Medicine , United Kingdom
An optical waveguide amplifier is fabricated in SU8 polymer with a cladding layer of dye-doped PMMA. Gain of 15dB is achieved for a 650nm signal, with a low threshold pump intensity of 0.25µJ/mm2.
We4.P.74
A New Category of Tellurite Glasses for Ultra-Broadband Fibre Raman Amplifiers
Y Ohishi , G Senthil Murugan , T Suzuki , Toyota Technological Institute , Japan
Performance of a new phospho-tellurite glass system as Raman amplification media is reported. It is clarified this system realizes continuous Raman spectra from 550 to 1300 cm-1 and is promising as ultra-broadband Raman amplification media.
We4.P.75
A Novel Self-Heterodyne Filtering Method by Wavelength Shift Keying Modulation for Optical CDMA
J H Joseph , S D Sadot , Ben Gurion University , Israel
We propose and demonstrate a new method of optical CDMA based on self-heterodyne filtering. As compared to most CDMA systems, low spectrum spreading is required, thus enabling longer reach transmission capability.
We4.P.76
Derivation of Analytical Expression for Third-Order Dispersion Elimination Using Time-Domain Optical Fourier Transformation
T Hirooka , M Nakazawa , Tohoku University , Japan
We show theoretically that waveform distortion caused by third-order dispersion can be completely eliminated by using time-domain optical Fourier transformation, which we have previously demonstrated experimentally. The analytical expression that describes the distortion elimination is newly derived.
We4.P.77
Thermally Widely Tunable Laser Diodes with Distributed Feedback
R Todt , T Jacke , R Meyer , M-C Amann , Walter Schottky Institut, Technische Universität München , Germany
A monolithic, thermally widely tunable laser that covers the wavelength range between 1552 and 1602 nm is presented. The device requires only two tuning currents for wide quasi-continuous wavelength tuning and is readily manufacturable with conventional DFB laser fabrication technology.
We4.P.78
Bending Induced PMD in Spun Erbium Doped Fibre
P B Gaarde , T Geisler , P Kristensen , B Pálsdóttir , OFS Fitel Denmark ApS , Denmark
We have measured the DGD induced by bending in both active and passive erbium doped fibres. We demonstrate, both theoretically and experimentally, non-trivial behaviour of PMD in spun Erbium Doped Fibre (EDF) when coiled to small diameters.
We4.P.79
Protection and LAN Emulation in Ethernet Passive Optical Networks
N Nadarajah , A Nirmalathas , E Wong , The University of Melbourne , Australia
We propose and experimentally verify a scheme for fast automatic protection switching and customer networking in an Ethernet passive optical network by redirecting the upstream signals back to the customers using a secondary distribution fibre.
We4.P.80
Improvement of the Performance for Wavelength Converters Based on Cross-Polarisation Modulation
X Teng , H Jiang , L B Hu , H Y Zhang , Department of Electronics Engineering of Tsinghua University , China
Techniques for improving the performance of wavelength converters based on cross-phase modulation in a semiconductor optical amplifier are presented.
TOP OF PAGE We4.P.81
Performance Analysis of Single-MZM APRZ Transmitter
M Forzati , A Berntson , J Mårtensson , Acreo , Sweden, R J Davies , TRLabs , Canada
We present the first numerical study of 67%-duty-cycle single-MZM APRZ, comparing it with 33% RZ, 33% APRZ and standard CSRZ. This transmitter is shown to combine CSRZ implementation simplicity with the improved nonlinear tolerance \pi/2-APRZ.
We4.P.82
Behaviour of in-Fibre Bragg Gratings in Hydrogen Atmosphere at Elevated Temperature
A V Lanin , O V Butov , E M Dianov, A M Prokhorov General Physics Institute of the Russian Academy of Sciences , Russia, K M Golant , A. M. Prokhorov General Physics Institute of the Russian Academy of Sciences , Russia & Business-Unitech Co. Ltd. , Russia
The evolution of reflectance spectra is recorded during Bragg gratings heat treatment in hydrogen atmosphere at a pressure of 8 MPa and temperatures up to 600°C. ‘Type I' and ‘type IIA' gratings written in germanium- and nitrogen-doped-silica-core fibres are investigated.
We4.P.83
ARTEMIS: A New Architecture for All-Optical Asynchronous Self-Routing Network with Efficient Contention Protection and QoS Differentiation
K Vyrsokinos, E Kehayas, L Stampoulidis, H Avramopoulos, National Technical University of Athens , Greece , K Christodoulopoulos, K Vlachos, E A Varvarigos, University of Patras , Greece
We present a new architecture for bufferless, asynchronous all-optical self-routing network combining an efficient physical layer structure and conflict-preventing signalling protocol for providing lossless communication with optimum resource utilisation and QoS differentiation.
We4.P.84
Comparative Analysis of 40 Gbit/s Optical Amplitude/Phase Modulation Formats in the Presence of Channel and Receiver Impairments
M Secondini, E Forestieri, G Prati, Scuola Superiore Sant'Anna & CNIT, Photonic Networks National Lab, Italy , F Cavaliere, A Palagi, G Bruno, Marconi Communications, Italy
The performance of different modulation formats in presence of amplification noise, chromatic dispersion and PMD is analytically determined. The impact of narrow optical filtering and a phase error in the interferometric detection is also investigated.
We4.P.85
Long-Term PMD Measurements in a Metropolitan Operational G.652 Cable Plant
S Abrate, A Nespola, Istituto Superiore Mario Boella, Italy , C Lezzi, FastWeb S.p.A., Italy , V Ferrero, P Poggiolini, Politecnico di Torino, Italy
We performed a 73-days PMD measurement in an installed G.652 fibre infrastructure, in a metropolitan network. We found that, despite a very stable behaviour of the plant, some statistical anomalies may occur, and that maintenance operations may ultimately be the key factor for PMD variations.
We4.P.86
Passively Modelocked 20 and 40GHz Bulk InGaAsP Lasers
Y Barbarin, E A J M Bente, M J R Heck, Y S Oei, R Nötzel, M K Smit, COBRA Research Institute , The Netherlands
Passively modelocked linear lasers have been fabricated using bulk InGaAsP/InP material. Modelocking in 20 GHz self colliding pulse modelocked lasers and 40GHz colliding pulse lasers has been demonstrated and the devices have been characterised. Pulse lengths down to 1.6 ps have been observed.
We4.P.87
End-to-End Lightpath Establishment Based on Rank Accounting without Wavelength Conversion for Multi-Domain WDM Networks
T Tachibana , H Harai , National Institute of Information and Communications Technology , Japan
We propose a new end-to-end lightpath establishment based on rank accounting for multi-domain WDM networks. End-to-end lightpaths are established with low blocking probability without wavelength conversion across multiple domains.
We4.P.88
Design of Multisection Semiconductor Laser for 40 Gb/s Direct Modulation
M Radziunas, U Bandelow, M Wolfrum, A Glitzky, R Hünlich, Weierstrass Institute for Applied Analysis and Stochastics , Germany , U Troppenz, J Kreissl, Fraunhofer-Institute for Telecommunications, Heinrich-Hertz-Institut , Germany
We consider theoretically a direct modulated distributed feedback laser with a very short integrated external cavity. We show how a proper selection of the field feedback strength and phase imply a required device performance for large signal modulation with 40 Gb/s NRZ signal.
We4.P.89
Highly Efficient and Wavelength-Tunable Holmium-Doped Silica Fibre Lasers
Y Li , Y Zhao , B Ashton , S Jackson , S Fleming , The University of Sydney , Australia
Tunable and temporal characteristics of holmium-doped silica fibre laser in different configurations were described. Wavelength tuning over 160 nm was demonstrated and a 4.3-W single-transverse-mode 2.1-micrometer output power was obtained for a 0.6-m holmium fibre.
We4.P.90
RF Bandwidth Capacity and SCM in a Radio-over-Fibre Link Employing Optical Frequency Multiplication
M García Larrodé , A M J Koonen , J J Vegas Olmos , I Tafur Monroy , T C W Schenk , Eindhoven University of Technology , The Netherlands
We demonstrate the feasibility of generating two 24Mbps 64-QAM radio signals simultaneously at 17.3GHz and 17.8GHz after 4.4km of multimode fibre in an OFM radio-over-fibre link for wireless multistandard support at the antenna site.
TOP OF PAGE We4.P.91
A New High Bit Rate Orthogonal ÉÌ /FSK Scheme Based on an All Fibre Realisation, for AOLS Applications
N S Skarmoutsos , E N L Lallas , D S Syvridis , University of Athens, Greece
An all fibre, high bit rate IM/FSK orthogonal scheme is proposed for the combination of 2.5Gbps label onto 40Gbs payload via FWM and the realisation of AOLS via XPM, both based on DSF fibre.
We4.P.92
Thermally Tunable Fused Fibreoptic 2x2 Coupler
T Duthel , Gesellschaft für Wissens- und Technologietransfer der TU Dresden mbH , Germany , M Spaarschuh , C G Schäffer , Technische Universität Dresden, Germany
We present a novel tunable fused fibreoptic 2x2 coupler. The coupling ratio of this device can be fully tuned in a range from 0% to 100% by applying a temperature change of only 15 K.
We4.P.93
VCSEL Arrays with Redundant Pixel Designs for 10 Gbit/s 2-D Space-Parallel Multimode Fibre Transmission
H Roscher , M Bou Sanayeh , S B Thapa , R Michalzik , University of Ulm , Germany
We demonstrate two-dimensional flip-bonded 850-nm VCSEL arrays with three close-spaced lasers per channel equally butt-coupled to one 50-µm fibre for improved transceiver lifetimes. Quasi error-free 10-Gbit/s signals are transmitted over 500 m of multimode fibre.
We4.P.94
Air-Guiding Photonic Bandgap Fibre with Improved Triangular Air-Silica Photonic Crystal Cladding
M Yan , P Shum , Network Technology Research Centre , Singapore
We introduce a small-core air-guiding photonic crystal fibre whose cladding is made of improved air-silica photonic crystal with non-circular air holes placed in triangular lattice. The fibre achieves un-disturbed bandgap guidance over 350nm wavelength range.
We4.P.95
A Packet-Switched Waveband-selective PON Enabling Optical Internetworking among ONUs
Y Su , P Hu , W Hu , J Zhang , H He , X Tian , Y Jin , Shanghai Jiao Tong University , China , L Leng , City University of New York , United States
We propose and demonstrate a novel packet-switched PON with waveband selectivity in ONUs, which enables internetworking of ONUs in a group. This configuration clearly improves the latency and throughput performance by reducing the electronic bottleneck in the OLT.
We4.P.96
Fundamental Saturated Amplifier Channel Power Dynamics in Transparent Networks
D C Kilper , C A White , Bell Laboratories, Lucent , United States
The optical power response of wavelength-division-multiplexed channels to gain variations in uncontrolled saturated amplifiers in high-capacity, large node-count transparent mesh networks is studied through numerical simulations.
We4.P.97
Protecting Guaranteed Service Traffic in an OpMiGua Hybrid Network
S Bjørnstad, Telenor R&D & Norwegian University of Science and Technology , Norway, H Øverby, N Stol, D R Hjelme, Norwegian University of Science and Technology , Norway
We propose protection mechanisms for a hybrid OpMiGua node and network architecture. A pre-buffering mechanism, which guarantees no packet loss in the case of a link failure, is proposed and delay characteristics are analysed.
We4.P.98
Novel Scheme for Simultaneous Polarisation Mode Dispersion and Optical Signal-to-Noise Ratio Monitoring
E Wong, A Nirmalathas National ICT Australia, Victoria Research Laboratory & The University of Melbourne , Australia, J Tan, The University of Melbourne , Australia
We propose a novel scheme to monitor PMD and OSNR using incomplete polarisation extinction of PMD-affected signals. The measured PMD-induced signal leakage is used to alleviate OSNR measurement errors to within 0.8 dB of reference measurements.
We4.P.99
Anycast Routing in Optical Burst Switched Grid Networks
M De Leenheer, P Thysebaert, B Volckaert, F De Turck, B Dhoedt, P Demeester, University of Ghent, Belgium , F Farahmand, J Jue, The University of Texas at Dallas, United States
To deliver virtually unlimited computing power to residential users, an anycast routed Optical Burst Switched Grid infrastructure is proposed. This architecture is evaluated and compared with traditional shortest path routed systems in Optical Circuit Switched and Burst Switched networks.
We4.P.100
Experimental Investigation of Three-Point Sampling Technique for the Estimation of First Order PMD
Y Benlachtar , R I Killey, P Bayvel, University College London , United Kingdom
Experimental investigation of three-section eye-diagram sampling technique for estimating polarisation mode dispersion is presented. We demonstrate that both the differential group delay and the power split ratio between the polarisation states can be simultaneously and accurately measured.
TOP OF PAGE We4.P.101
Performance Evaluation for UWB Signal Transmissions in the Distributed Multi-Cell Environment Using ROF Technology
Y H Kim , S Kim, H D Jang, S Hur, J H Lee, J C Jeong, Korea University, South Korea
We estimate the performance of ultra-wideband (UWB) signal transmissions for a multi-cell environment combined with a large virtual cell using radio-over-fiber (ROF) technologies. Our simulation results suggest that the delay time of about 125ps significantly affects the link margin for PPM. The optimum peak-to-peak voltage (Vp-p) of Mach-Zehnder modulators (MZMs) has been obtained to be 2.4V for the best link margin.
We4.P.102
Bi-directional Operation of a Dispersion Compensating Module in a Regional System
W Zheng , H P Sardesai, J L Archambault, Ciena Corporation , United States
The bi-directional operation of a fibre dispersion-compensating module is studied in a re-circulating loop for system cost reduction. Having a 20 GHz offset between forward and backward propagating signals, minimizes the impact of Rayleigh and Brillouin scattering.
We4.P.103
Are Translucent Networks Always Economically Attractive?
A Morea , J Poirrier, France Télécom Division R&D , France
The economical benefit of translucent networks is investigated using a cost model, in which system cost increases with reach. Savings appear with significant traffic volumes augmentation and with ULH systems price reduction.
We4.P.104
New Homodyne Receiver with Electronic I&Q Differential Demodulation
J Prat , J M Fàbrega, Universitat Politecnica de Catalunya (UPC) , Spain
A novel PSK homodyne receiver technique is proposed based on I&Q electronic differential processing, featuring high tolerance to phase noise and feasible implementation with commercial lasers.
We4.P.105
Numerical Study on the Tolerance to Intrachannel Crosstalk of Direct-Detection DPSK Optical Systems
L G Cancela , J O Pires, Instituto de Telecomunicações , Portugal
An analytical method for evaluating the intrachannel crosstalk tolerance of DPSK systems relatively to OOK systems is presented. It is shown that the high crosstalk tolerance of DPSK reduces as the number of interferers increases.
We4.P.106
Square Root Strategy: a Novel Method to Linearize an Optical Communication System with Electronic Equalizers
J Prat , J M Genè, M Omella, Universitat Politecnica de Catalunya (UPC) , Spain , A Napoli, P Poggiolini, V Curri, Politecnico di Torino , Italy
We demonstrate a non-linear function after the photodetector that linearizes dispersion-limited IM-DD systems, enhancing the performance of linear electronic equalization. Results showed a clear improvement in terms of chromatic dispersion tolerance.
We4.P.107
Mitigation of Signal Degradation due to Cascaded Filters by Optical 3R Regeneration at 40Gb/s
R Inohara , K Nishimura, M Usami, KDDI R&D Laboratories Inc. & OITDA, Japan
40Gb/s regeneration capability of optical 3R regenerator against severe filter concatenation has experimentally verified for the first time both for 100GHz channel spacing with CS-RZ signal and for 200GHz channel spacing with RZ signal.
We4.P.108
Multi-time Scale Adaptive Optical Packet Assembly Based on Internet Traffic Prediction
J Kang , Z Lu, M Reed, University of Essex , United Kingdom
This paper proposes a novel adaptive optical packet assembly algorithm, which utilizes traffic prediction and the Internet traffic characteristics at multi-time scales to improve the aggregation performance. Simulation results assess the merits of the algorithm.
We4.P.109
Channel Monitoring in WDM Systems by Utilising Polarisation Scrambling
M Sköld , B-E Olsson, H Sunnerud, M Karlsson , P A Andrekson , Chalmers University of Technology , Sweden
We demonstrate a novel technique for channel monitoring in polarization scrambled WDM systems using only a polarizer and a detector at the monitoring node. Information about the system polarization properties is also obtained.
We4.P.110
One-bit All-optical Memory
F Ponzini , N Andriolli, P Castoldi, CEIRC – Scuola Superiore Sant' Anna , Italy , L Banchi , Pisa University , Italy, A Bogoni , L Potì, Photonic Network National Laboratory – CNIT , Italy
Erbium-doped fiber properties are exploited to store energy. An all-optical memory cell with 2.5 ms refresh time, 752 µ J writing energy, 316 µ J erasing energy, and contrast ratio up to 21 dB is experimentally demonstrated.
TOP OF PAGE We4.P.111
Detailed Modelling and Experimental Characterisation of an Ultra-fast Optoelectronic Clock Recovery Circuit
D Zibar , L O Oxenløwe, J Mørk, M P Sørensen, M Galili, T Clausen, B Sørensen, P Jeppesen, Technical University of Denmark , Denmark
We present a comprehensive theoretical and experimental study on the fundamentals of an ultra-fast optical clock recovery scheme. The impact of gain and loop delay is described and suggestions for minimising timing jitter are given.
We4.P.112
Robustness of the OOK Modulation Formats at 40 Gbit/s in the Practical System Infrastructure
E Pincemin , J Y Guilloux, A Bezard, T Vargas, France Telecom , France , A Tonello, S Wabnitz, Université de Bourgogne , France , J D Ania-Castanon, S K Turitsyn, Aston University , United Kingdom
We experimentally investigate the robustness of OOK modulation formats at 40 Gbit/s versus transmission impairments and optical filtering. This study is a pre-requisite for the implementation of robust transparent networks.
We4.P.113
Mode Group Diversity Multiplexing Transceiver Design for Graded-Index Multimode Fibres
CP Tsekrekos , A Martinez, F M Huijskens, A M J Koonen, Eindhoven University of Technology , The Netherlands
Mode group diversity multiplexing (MGDM) is an optical multiple-input multiple-output (MIMO) technique for short-reach networks. In this paper a simple MGDM transceiver design for glass graded-index multimode fibres is proposed.
We4.P.114
Transmission Properties of a 40 Gb/s Signal in FSK Modulation Format
N Chi , S Yu, University of Bristol , United Kingdom
A 40 Gb/s FSK signal is transmitted over 50 km SMF with 0.8 dB penalty and over 12 dB resilience of span input power. Multi-span transmission is numerically compared with RZ and DPSK formats.
We4.P.115
Optical-Signal-to-Noise Ratio Monitoring for Packet Switched Networks
X Yi , W Chen, W Shieh, The University of Melbourne , Australia
We present the first experimental demonstration of direct optical-signal-noise-ratio (OSNR) monitoring on the packet basis. The OSNR monitoring error is found to be < 0.6 dB in a dynamic range from 10 dB to 30 dB.
We4.P.116
Remote Downconversion for the Radio/Fibre Uplink Connection
A M Kaszubowska-Anandarajah , L P Barry, Dublin City University , Ireland
Authors demonstrate a new technology for uplink transmission in Radio-over-Fibre systems. The technique employs remote downconversion of the uplink data to Intermediate Frequency in the Base Station, by making use of a Local Oscillator sent from the Central Station.
We4.P.117
Cascadability Study of 16 1x9 Wavelength Selective Switches with 5x42.6 Gb/s CS-RZ Channels
B Clouet , B Le Guyader, S Lobo, F Merlaud, J C Simon, ENSSAT / PERSYST , France , T Ducellier , Metconnex , Canada
Wavelength Selective Switches will play a significant role in future networks. We study the system limitations induced by a cascade of 16 WSS on the propagation of 5 CS-RZ 42.6 Gb/s channels.
We4.P.118
Improved detection of Differential Phase Shift Keying Through Multi-symbol Phase Estimation
S Calabro , Siemens AG COM , Germany ; D van den Borne , S L Jansen, G D Khoe, H de Waardt, Eindhoven University of Technology , The Netherlands
We report an improved self-homodyne detection scheme for differential phase-shift-keying that achieves close to homodyne performance and effectively reduces the influence of nonlinear phase noise, resulting in a 1.3dB sensitivity improvement over self-homodyne detection.
We4.P.119
Quaternary System Based on Phase and Polarization Modulation with Differential Detection
J M Gené , J Comellas, J Prat, Universitat Politècnica de Catalunya , Spain
In this paper we propose a novel modulation scheme based on the orthogonality between absolute and relative phase of an EM wave while using a differential detector to avoid the need of any polarization control.
We4.P.120
PMD-insensitive DOP-Based OSNR Monitoring Assisted by Transmitter-Side Polarisation Scrambling
G W Lu , M H Cheung, L K Chen, C K Chan, The Chinese University of Hong Kong , China
We demonstrate a simple PMD-insensitive DOP-based OSNR monitoring technique aided by transmitter-side polarization scrambling. At OSNR=25 dB, OSNR monitoring with about 1-dB standard deviation was achieved in 10-Gb/s NRZ-OOK systems with DGD of 0~80 ps.
TOP OF PAGE We4.P.121
Optical Frequency Comb Generation Using Asymmetrically Dual-Driven Mach-Zehnder Modulator
T Sakamoto , T Kawanishi, M Izutsu, NICT , Japan
We propose and demonstrate optical frequency comb generation with good spectral flatness, using a conventional Mach-Zehnder modulator asymmetrically dual-driven by large-amplitude sinusoidal signals with different amplitudes. 120-GHz bandwidth, 10-GHz spacing frequency comb was experimentally generated.
We4.P.122
16nm Tunable DBR-SOA Compatible with 10Gb/s Packet Switching
H Debrégeas-Sillard , M Goix, J-G Provost, D Carpentier, J Landreau, R Brenot, Alcatel-Thalès III-V Lab , France
We present a 22mW - 16nm tunable DBR-SOA, robust and simple to control. Less than 12ns tuning speed is obtained by electrical pattern optimisation, and 10Gb/s reconfigurable wavelength conversion compatible with packet switching is demonstrated.
We4.P.123
Observation of the Enhancement of the Stark Shift in Amplitude Modulators with a Delta Doping Superlattice
M C L Areiza , C V B Tribuzy, S M Landi, M P Pires, P L Souza, Pontifícia Universidade Católica do Rio de Janeiro , Brazil
An enhacement by a factor of two of the Stark shift in amplitude modulators containing an nipi delta-doping superlattice in the multiple quantum well region is observed. This enhancement substantially reduces the device operation voltage.
We4.P.124
Extinction Ratio Improvement and Negative BER Penalty for 2R Regeneration in Mach-Zehnder Wavelength Converter with Pre-amplifiers
D C Kim, Y A Leem, E D Shim, K H Park, Electronics and Telecommunications Research Institute, South Korea, M Y Jeon, Chungnam National University, South Korea , D S Yee, Korea Research Institute of Standards and Science, South Korea
Extinction ratio (ER) improvement and BER penalty were measured in Mach-Zehnder wavelength converter with preamplifiers at 10Gbit/s. For the input with smaller ER, the ER was more improved and BER showed larger negative penalty.
We4.P.125
Monolithically Integrated External-Cavity Tunable Laser
O K Kwon , J H Kim, K H Kim, E D Sim, H S Kim, K R Oh, ETRI , South Korea
We propose a novel external-cavity tunable laser realized by monolithically integrating a semiconductor optical amplifier, a phase-control section, a dispersive element, and an etched diffraction grating in InP. The tuning operation is based on electrically controlled deflection of the propagating beam through the dispersive element while the grating offers to select a specific wavelength. With the electrical control, the continuous wavelength tuning of 11nm with a side mode suppression ratio of more than 35dB has been successfully achieved.
We4.P.126
Tunable External Cavity Laser Diode Monolithically Integrated with Planar Waveguide Parabolic-Shaped
Collimating Lens and Optical Deflector
H S Kim , E D Sim , J H Kim , K H Kim , O K Kwon , K R Oh , ETRI , South Korea
A novel lensless tunable external cavity laser diode monolithically integrated with InP-based planar waveguide parabolic-shaped collimating lens, optical deflector and echelle grating is proposed and demonstrated in this work. The tunable laser exhibits total wavelength tuning range of 9.3 nm and quasi-continuous tuning (0.05 nm) with high SMSR as high as 40 dB by adjusting applied current of optical deflectors and phase control section.
We4.P.127
Novel Coupling Element for End-Pumping of Double-Clad Fibres
P Peterka , I Kašík, V Matejec, J Kanka, M Karásek, M Hayer, J Slánicka, Academy of Sciences of the Czech Republic , Czech Republic
We present a novel coupling element for end-pumping of double-clad fibre amplifiers and lasers. Device fabrication using a double-clad fibre of tailored cross section and a commercial fusion splicer is demonstrated.
We4.P.128
Complete Characterisation of the Generation of a 2.8ps Pedestal-free Optical Pulse Using a Gain-switched Laser and a Compressing Nonlinear Amplifying Loop Mirror
W Chang , D Mechin, E Le Cren, D A Reid,J D Harvey, University of Auckland , New Zealand , B C Thomsen , University College London , United Kingdom
We report the generation of a 1GHz 2.8ps pedestal-free (suppression > 30dB) optical pulse from a seeded gain-switched semiconductor laser diode (GSL) using a compressing nonlinear amplifying loop mirror (CALM). Preliminary results with a 10GHz repetition rate source will be also briefly discussed. This source is suitable for multiplexing into 40Gb/s transmission.
We4.P.129
Energy Transfer Processes Related to the S-Band Transition in Tm 3+ Doped Silica Fibres
D A Simpson , G W Baxter, S F Collins, OTRL-CTME, Victoria University , Australia , W E K Gibbs , S winburne University of Technology , Australia , W Blanc , B Dussardier, G Monnom, Université de Nice - Sophia Antipolis , France
An energy transfer up-conversion process is observed in thulium-doped alumino-silicate fibres for Tm2O3 concentrations as low as 35 ppm-mol. This important mechanism to the 1470-nm S-band gain efficiency is studied with a simple model.
We4.P.130
Enabling “Hinge” Model by Slow Dynamics in Variable DGD based PMD Emulator
L S Yan , General Photonics Corp & University of Southern California , United States , X Yao, General Photonics Corp , United States , A E Willner , University of Southern California , United States
By slow polarization coupling and re-organizing applied DGD to each section of variable DGD based PMD emulator, we realize slow dynamics with negligible distortion of generated PMD statistics to enable ”hinge” model for system evaluation.
TOP OF PAGE We4.P.131
Spectral Characterisation of Differential Group Delay in Fibre Bragg Grating Written into Hi-Bi Optical Fibre
S Bette , C Caucheteur, M Wuilpart, M Blondel, P Mégret , Faculté Polytechnique de Mons , Belgium
This paper analyzes the wavelength dependency of differential group delay for a uniform Bragg grating written into a highly birefringent fibre. A theoretical expression is derived and experimental results are reported.
We4.P.132
Fabrication of Fibre Bragg Gratings by Sequential UV-Writing with Real-Time Interferometric Side-Diffraction Position Monitoring
KC Hsu , Y Lai, National Chiao-Tung University , Taiwan, LG Sheu , Vanung University , Taiwan
We present two real-time fiber position monitoring methods for sequentail Fiber-Bragg-Grating UV-writing process. Before writing every grating section, the just-exposed grating section or the reference fiber grating is probed by an interferometric side-diffraction method to measure the grating phase as position reference.
We4.P.133
Stable FM Mode-Locked Erbium Fibre Ring Laser with a Dispersive Medium
Y J Kim , D Y Kim , GIST , South Korea
We report a stabilization scheme of a FM mode-locked erbium fiber ring laser in anomalous dispersion or normal dispersion. Fast gain saturation characteristic of a SOA enabled supermode noise suppression up to 70 dB at both dispersion medium.
We4.P.134
Comparison Analysis between the Noise Properties of Single-Pump and Dual-Pump Fibre Optical Parametric Amplifiers
A Bogris , D Syvridis, University of Athens , Greece , P Kylemark , P Andrekson, Chalmers University of Technology , Sweden
A comparison between the noise characteristics of single-pump and dual-pump fiber optical parametric amplifiers is theoretically carried out in terms of the noise figure, accounting for the amplified quantum noise and the excess pump noise.
We4.P.135
Novel Er/Raman Fibre Amplifier Covering S + C + L Bands with 100 nm Bandwidth
H S Seo , J T Ahn, W J Chung , B J Park, ETRI , South Korea
We report the 1st experimental demonstration of a novel Er/Raman fibre amplifier covering S+C+L bands with total bandwidth of 100 nm using a medium consisting of Er-doped fibre (EDF) and dispersion compensating fibre (DCF).
We4.P.136
Experimental Reduction of WDM Signal Crosstalk in Fibre Optical Parametric Amplifiers by Using Orthogonal Pumps
K K Y Wong, The University of Hong Kong , China , G W Lui , L K Chen, The Chinese University of Hong Kong , China, M E Marhic , Stanford University , United StatesWe show that the signal quality degradation of WDM channels in a two-pump optical parametric amplifier (OPA) is dominated by the cross-gain modulation (XGM) and we demonstrated experimentally that it can be improved significantly by a two-orthogonal-pump OPA (2OP-OPA).
TOP OF PAGE
|