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Wavelength Reservation Scheme with Switch Fabric Status in Distributed Mesh optical networks

Journal of Shanghai Jiaotong university(Science) 2009年第3期14卷 325-330页

作者：陆丽华曾庆济 State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems Shanghai Jiaotong University

A new wavelength reservation scheme is proposed the reconfiguration times of optical cross-connects （OXCs） for we consider the reconfiguration information of switch fabrics to mitigate the connection setup time and minimize WDM optical networks in this study. In this scheme, in the signaling protocol, which is designated as the signaling with switch fabric status （SWFS）. Distributed reservation algorithms will reserve the wavelength with minimum of reconfiguration times of OXCs along the route. Simulation results indicate that the proposed schemes with switch fabrics status have shorter setup time, lower switching ratio as well as better blocking performance than those of the traditional classic schemes. Moreover, the proposed schemes with SWFS significantly reduce the number of switch fabrics that need to be reconfigured.

关键词： optimization distributed lightpath establishment signaling protocols wavelength reservation wavelength-routed networks switch fabrics

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Numerical analysis of fiber optical parameter amplifier based on triangular photonic crystal fiber

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Science in China(Series F) 2009年第7期52卷 1272-1277页

作者： SHANG maoi LIU ZengJi YUE Peng CHEN JianPing State Key Laboratory of Integrated Service Network Xidian University Xi'an 710071 China State Key Laboratory on Fiber-Optic Local Area Communication Networks and Advanced Optical Communication Systems ShanghaiJiao Tong University Shanghai 200030 China

Due to triangular photonic crystal fiber （PCF） high nonlinearity and low dispersion slope, using the condition that the different linear phase shift combination must satisfy the phase match, the expressions of gain and bandwidth for one-pump fiber-optic parametric amplifiers （1P-FOPA） based on PCF in the normal and abnormal dispersion regimes are derived respectively. Then, 1P-FOPAs performance comparison among PCF, dispersion-shifted fiber （DSF） and highly nonlinear fibers （HNLF） are carried out by numerical simulations. It is shown that the 1P-FOPA based on triangular PCF can provide higher peak gain over wider bandwidth. When the pump wavelength is at the zero-dispersion wavelength （ZDWL）, about 108.7 nm single-pass gain bandwidth and 91.4 dB peak gain can be obtained; when in the normal dispersion regime and near zero-dispersion wavelength, not less than 46 nm single-pass gain bandwidth 77.1 nm away from pump can be achieved. Finally the influence of dispersion fluctuation is analyzed, and the result shows that the tolerance of the 1P-FOPA based on photonic crystal fiber is better.

关键词： fiber optical parametric amplifier photonic crystal fiber gain bandwidth zero-dispersion wavelength variations

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A distributed collision-free access control protocol for metro area ring networks

A distributed collision-free access control protocol for met...

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IASTED International Conference on Modelling, Simulation, and Identification, MSI 2009

作者： Hu, Xie Ge, Fan State Key Lab. on Fiber-Optic Loc. Area Commun. Networks and Adv. Optical Communication Systems Shanghai Jiaotong University Shanghai 200240 China

ISBN: (纸本)9780889868106

Since network traffic of Metro area networks (MAN) shows asymmetric, burst, and highly dynamic, OBS becomes a compromise between enormous bandwidth of WDM and smaller flow of terminal individual users. Based on the analysis of several access control mechanisms of OBS metro ring network, this study presents a distributed collision-free (DCF) access control protocol. Using simple topology structure of ring network, this protocol assumes that all nodes in the ring networks are distributed evenly. Owing to adopting multi-token for data access control in ring network, which is not only for each data channel but also for node-to-node, the protocol realizes the unified controlling for bursts in time and space, and provides advantages of high bandwidth utilization, conflict-free, low latency and good scalability.

关键词： optical burst switching

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Evolution of the optical polarization in a periodically poled superlattice with an external electric field

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Physical Review A 2009年第6期80卷 063808-063808页

作者： Kun Liu Xianfeng Chen []Department of Physics The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China

The polarization behavior of the electromagnetic waves under external electric field in the periodically poled optical superlattice is experimentally observed, which reveals that for the QPM wavelengths [fulfilling the quasi-phase-matched (QPM) condition] the evolution of the polarization exhibits generated paths along the Poincare sphere, but for the NQPM wavelength (not fulfilling the QPM condition) it will split into discrete paths. These phenomena are likely to promote a novel method for a precise polarization control.

关键词： Electromagnetic waves

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Phase matching in three-dimensional nonlinear photonic crystals

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Physical Review A 2009年第1期80卷 013801-013801页

作者： Junjie Chen Xianfeng Chen []Department of Physics The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems Shanghai Jiao Tong University 800 Dong Chuan Road Shanghai 200240 China

The coupled-wave equations of three-wave interactions are generalized into three dimensions. The reciprocal lattice vectors (RLVs) of three-dimensional (3D) nonlinear photonic crystals (NPCs) which show some unique properties are analyzed in detail as compared to those in one- and two-dimensional cases. It is proposed as an example that the cross-distributing conical harmonic beams can be obtained from the 3D NPC by intentionally using the proper RLVs. Some other possible applications are suggested at the end of discussion.

关键词： Phase matching

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Dynamic Scheduling Algorithms for Large File Transfer on Multi-user optical Grid Network Based on Efficiency and Fairness

Dynamic Scheduling Algorithms for Large File Transfer on Mul...

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International Conference on Networking and Services (ICNS)

作者： Miaochao Hu Wei Guo Weisheng Hu State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems Shanghai Jiaotong university Shanghai China

In this paper, we consider a multi-user optical grid environment where the optical grid network is shared among multiple users who have a high demand for data processing. In such multi-user grid environment, since the supercomputer can start the data processing only after the corresponding data file has reached it, one critical problem is how to effectively schedule large data file transfers on the optical grid network. In this paper, we propose four dynamic scheduling algorithms to address the issue of large file transfers on multi-user optical grid network. Two objectives, namely the efficiency and fairness, are considered to evaluate the performance of each scheduling algorithm. Efficiency aims at how to achieve the best overall quality of grid service, and fairness regards the service quality deviation among grid users. We study the performance of each algorithm, and a tradeoff between efficiency and fairness is shown by our results.

关键词： Dynamic scheduling Heuristic algorithms Scheduling algorithm optical fiber networks Data processing Supercomputers optical fiber communication optical fiber LAN Bandwidth Grid computing

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Generalized reflection time for one-dimensional structures

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Physical Review A 2009年第6期80卷 064102-064102页

作者： Cheng Yin Zhuangqi Cao Department of Physics The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems Shanghai Jiao Tong University Shanghai 200240 China

A generalized reflection time which follows directly from the Schrödinger equation without approximation is obtained. By the Winger-Eisenbud approach, this reflection time is conceptually well defined and can be applied to arbitrary continuous potentials including both quantum tunneling and quantum reflection issue. A simple explanation for the quantum reflection phenomenon is proposed and the explicit expression of the difference between the quantum reflection time and the classical reflection time is also derived.

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Thermo-optic SOI waveguide switch matrix

Thermo-optic SOI waveguide switch matrix

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International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors

作者： Chen, Yuan-Yuan Li, Yan-Ping Yu, Jin-Zhong College of Computer Science and Information Engineering Beijing Technology and Business University Beijing 100037 China National Laboratory on Local Fiber-Optic Communication Networks and Advanced Optical Communication Systems Peking University Beijing 100871 China State Key Laboratory on Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

ISBN: (纸本)9780819476623

optical switches are important devices in optical communications. A blocking 88 thermo-optic waveguide switch matrix and a rearrangeable nonblocking one are designed and fabricated on silicon-on-insulator (SOI) wafer. The building block of the matrix is a 22 switch cell with a Mach-Zehnder interferometer(MZI) configuration, where a general multi-mode interferometer (MMI) serves as splitter/combiners. Nonblocking switch matrix presents excess loss of 10.9dB7tild;13.6dB and crosstalk of -26.6dB7tild;-13.5dB. Blocking one presents excess loss of 6.6dB9.6dB and crosstalk of -25.8dB~-16.8dB. Their extinction ratios vary from 17dB to 25dB. The power consumption of each switch cell is less than *** response time is less than 3s. The power consumption and the response times are much better than that of silica-based or polymer-based switch matrix because of the large thermo-optic coefficient and the high thermal conductivity of silicon. © 2009 SPIE.

关键词： Crosstalk

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Measurement of the magnetic field-dependent refractive index of magnetic fluids in bulk

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Chinese optics Letters 2008年第3期6卷 195-197页

作者：刘婷陈险峰狄子昀张军锋李新碗陈建平 The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems Shanghai Jiao Tong University

An optical alignment-free and highly accurate method is employed to measure the magnetic field-dependent refractive index of magnetic fluid （MF） in bulk. The measured refractive index decreases significantly with the increasing magnetic strength and then tends to saturate in the high intensity range. By applying a tunable magnetic field ranging between 0 and 1661 Oe, the maximum shift of the refractive index of MF in bulk is found to be 0.0231.

关键词： Laser sources Magnetic fields Magnetic fluids optical testing Refractive index Tunable filters

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Security of quantum key distribution using two-mode squeezed states against optimal beam splitter attack

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Chinese Physics B 2008年第4期17卷 1263-1268页

作者：何广强朱思维郭红斌曾贵华 The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems Department of Electronic EngineeringShanghai Jiaotong University

For the beam splitter attack strategy against quantum key distribution using two-mode squeezed states, the analytical expression of the optimal beam splitter parameter is provided in this paper by applying the Shannon information theory. The theoretical secret information rate after error correction and privacy amplification is given in terms of the squeezed parameter and channel parameters. The results show that the two-mode squeezed state quantum key distribution is secure against an optimal beam splitter attack.

关键词： quantum key distribution two-mode squeezed states optimal beam splitter attack

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