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Low Power Penalty Operation of a Wide Input Dynamic Range Cross-Phase Modulation wavelength converter

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光学学报 2003年第S1期23卷 353-354页

作者： Jun Endo Akira Ohki Rieko Sato Toshio Ito Yuichi Tohmori Yasuhiro Suzuki NTT Photonics Laboratories NTT Corporation 3-1 Morinosato Wakatniya Atsugi-shi Kanagawa Pref. 243-0198 Japan

We successfully demonstrated low power penalty operation of a cross-phase modulated (XPM) wavelength converter using a semiconductor optical amplifier (SOA) power equalizer. We also clarified the SOA equalizing level for more adaptive wavelength conversion and achieved a power penalty of less than 1 dB over the wide input dynamic range of 15 dB.

关键词： wavelength converter Dynamic Range power penalty wavelength conversion optical amplifier range of

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Tunable wavelength converters of picosecond pulses based on periodically poled LiNbO3 waveguides

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Frontiers of Optoelectronics 2008年第Z1期1卷 58-63页

作者： Jian WANG Junqiang SUN Qizhen SUN Wuhan National Laboratory for Optoelectronics School of Optoelectronic Science and Engineering Huazhong University of Science and Technology

A tunable wavelength conversion between picosecond pulses is experimentally demonstrated by using cascaded sum-and difference-frequency generation(cSFG/DFG) in a periodically poled LiNbO3(PPLN)waveguide. The pulsed signal with 40 GHz repetition rate and 1.57 ps pulse width is adopted. When the input signal and the first control wavelengths are kept at 1554.2and 1532.5 nm, respectively, the output signal wavelength can be tuned from 1536.0 to 1545.2 nm as the second control wavelength varies from 1550.5 to1541.0 nm. By varying the first control wavelength to satisfy the quasi-phase matching(QPM) condition for sum-frequency generation(SFG) and simultaneously adjusting the second control wavelength, the tunable output signal wavelength can also be obtained when the input signal wavelength is changed. In the experiment,the amplified spontaneous emission(ASE) noise from the erbium-doped fiber amplifier(EDFA) is effectively suppressed by employing two narrow band tunable filters. Therefore, the wavelength down-and up-conversions are simultaneously observed.

关键词： wavelength converter periodically poled LiNbO3 (PPLN) cascaded sum- and difference-frequency generation (cSFG/DFG) wavelength down- and up-conversions

Performance analysis of optical burst switching node with limited wavelength conversion capabilities

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Journal of Central South University 2009年第5期16卷 794-801页

作者：许毅史开源范戈 State Key Laboratory of Advanced Optical Communication System and Network Shanghai Jiao Tong University Weapon and Task System Research Office 92728 Army of the Chinese People's Liberation Army

The systematical and scalable frameworks were provided for estimating the blocking probabilities under asynchronous traffic in optical burst switching(OBS) nodes with limited wavelength conversion capability(LWCC) . The relevant system architectures of limited range and limited number of wavelength converters(WCs) deployed by a share-per-fiber(SPF) mode were developed,and the novel theoretical analysis of node blocking probability was derived by combining the calculation of discouraged arrival rate in a birth-death process and two-dimensional Markov chain model of SPF. The simulation results on single node performance verify the accuracy and effectiveness of the analysis models. Under most scenarios,it is difficult to distinguish the plots generated by the analysis and simulation. As the conversion degree increases,the accuracy of the analysis model worsens slightly. However,the utmost error on burst loss probability is far less than one order of magnitude and hence,still allows for an accurate estimate. Some results are of actual significance to the construction of next-generation commercial OBS backbones.

关键词： optical burst switching (OBS) limited range wavelength conversion (LRWC) wavelength converter burst contention burst loss probability

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Performance analysis of optical multicast in a new switching structure

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 43-47页

作者： JIA Peng ZHANG Jie GU Wan-yi Key Laboratory of Optical Communication and Lightwave Technologies Ministry of Education Beijing University of Posts and TelecommunicationsBeijing 100876 China

The emergence of new services demands multicast function in optical network. Because of the high cost and complex architecture of multicast capable （MC） node, splitter- sharing switch structure is introduced in which the light splitters are shared by all input signals. To accommodate to this situation, by extending resource ReSerVation protocol-traffic engineering （RSVP-TE） and open shortest path first-traffic engineering （OSPF-TE）, a new optical multicast mechanism is provided and the signaling flow and its finite state machine model are given. At the same time, a multicast routing algorithm in splitter-sharing optical network and a changing link weight policy to balance network traffic are proposed. Simulations in NSFNET show no matter with or without wavelength converters, when the number of splitters is 25% of that demanded by traditional MC nodes, the multicast performance has been close to the ideal circumstance. wavelength converters and changing link weight help much in improving the traffic performance when the number of splitters is adequate.

关键词： splitter-sharing optical multicast optical network wavelength converter

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