检索结果-南通市图书馆

Chinese Journal of Lasers 2002年第2期11卷 13-17页

作者： YAN Minhui CHEN Jianping LI Jianlang JIANG WenningCHEN Junfeng LI Xin( The state key laboratory on fiber-optic local area communication networks and advanced optical communication systems, Shanghai Jiao Tong University,Shanghai 200030, China) Shanghai Jiao Tong Universit The State Key Laboratory on Fiber-Optic Local Area Communication Networks and Advanced Optical Communication Systems 上海 200030

A novel configuration algorithm for bi-directionally pumped Raman amplifier is developed by adopting simulated annealing algorithm. Automatic design of optical fiber Raman amplifier using 10 laser diode pumps with different wavelengths and powers is demonstrated for 64 channels DWDM systems. The resulted gain ripple is less than 2.6 dB in amplification bandwidth of more than 50 nm for a transmission span of more than 300 km. The algorithm can be practically applied to desired signal channel number and gain profile.

关键词： optical Raman amplifiers simulated annealing pumps dense wavelength division multiplexing

Analysis of Pulse Tolerance to Pump Depletion Induced Noise in DWDM systems Using Distributed fiber Raman Amplifiers

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Lasers 2002年第3期11卷 60-63页

作者： YAN Minhui CHEN Jianping LI Jianlang JINAG Wenning CHEN Junfeng LI Xin (the state key laboratory on fiber optic local area communication networks and advanced optical communication systems, Shanghai Jiao Tong University, Shanghai 200030, China) 上海交通大学 The State Key Laboratory on Fiber-Optic LocalArea Communication Networks and Advanced Optical Communication Systems 上海 200030

In distributed optical fiber Raman amplifiers, instantaneous pump power depletion is related to patterns of input DWDM signals and results in extra optical noise and crosstalk. This noise has different effects on non return to zero (NRZ) and return to zero (RZ) pulse forms. These phenomena are compared with present simulation results.

关键词： Raman scattering optical amplifiers dense wavelength division multiplexing crosstalk optical noise

A Novel Fabrication for Method Long Periodfiber Grating

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Lasers 2002年第2期11卷 39-42页

作者： HE Shuo LI Xinwan YE Ailun HE Wanxun SONG Hao(state key laboratory on local fiber communication networks andadvanced fiber communication systems, optical fiber Technology Institute,Shanghai Jiaotong University, Shanghai 200030, China) optical fiber Technology Institute Shanghai Jiaotong University State Key Laboratory on Local Fiber Communication Networks and Advanced Fiber Communication Systems 上海 200030

A new method of fabricating all-fiber broadband-rejection filter based on long period fiber grating (LPFG) is proposed. The principle in the method is to make periodic asymmetrical deformation in the core of fiber without microbends by electrode discharging so as to induce periodic refractive index changes. Two kinds of filters whose rejection peak wavelength at 1550 nm and 1310 nm are obtained. The insertion loss is less than 0.6 dB and 1.4 dB respectively. The 20 dB bandwidth ranges from 10 nm to 39 nm. The backward reflection loss is extremely small (less than - 70 dB). Such devices can be used as isolation filters in 1310/1550 nm WDM system and other fields.

关键词： long period fiber grating band-rejection filter asymmetrical deformation

A QoS-Guanranteed Scheduling Algorithm with High Throughput for Edge Nodes of optical Burst Switching networks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

光学学报 2003年第S1期23卷 747-748页

作者： Guiling Wu, Jianping Chen, Xinwang Li, Junfeng ChenThe state key laboratory on fiber-optic local area communication networks and advanced optical communication systems, Shanghai Jiao Tong University, Shanghai 200030, P. R. China The state key laboratory on fiber-optic local area communication networks and advanced optical communication systems Shanghai Jiao Tong University Shanghai 200030 P. R. China

A scheduling algorithm for the edge nodes of optical burst switching (OBS) networks is proposed to guarantee the delay requirement of services with different CoS (Class of Service) and provide lower burst loss ratio a... 详细信息

关键词： QoS of A QoS-Guanranteed Scheduling Algorithm with High Throughput for Edge Nodes of optical Burst Switching networks WDM Edge OBS for with

Performance Analysis of High-speed optical Pulse Transmission in Dispersion-managed Nonlinear Birefringent fiber Using Quantum Well Laser Diode Sources

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Lasers 2002年第1期 35-39页

作者： YAN Minhui CHEN Jianping (The state key laboratory on fiber-optic local area communication networks and advanced optical communication systems Shanghai Jiao Tong University, Shanghai 200030, China)

This paper analyzes the high bit-rate optical pulse trasmission in single mode optical fiber with chromatic dispersion, polarization mode dispersion (small random birefringence) and nonlinearity. Numerical method employed can precisely describe their interactive effect on transmission performance. Different dispersion maps and the related performance are analysed. Various simulation results and discussion are given. The results show that chromatic dispersion compensation should be carefully designed. Appropriate dispersion management can also alleviate the effect of polarization mode dispersion.

关键词： quantum well laser diode nonlinearity polarization mode dispersion dispersion compensation coupled nonlinear SchrAo¨Gdinger equations

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

改进的前跳虚时钟调度算法

上海交通大学学报 2002年第6期36卷 785-788页

作者：胡刚何骏范戈上海交通大学区域光纤通信网与新型光通信系统国家重点实验室上海200030

基于前跳虚时钟算法原理提出了一种新的调度算法 ,它将业务所预留的带宽和链路的剩余带宽实时分离 ,并用剩余带宽改善其他种类业务的 Qo S特性 ,使得带宽资源的分配更加灵活 .理论分析和仿真证明 ,算法不仅降低了“尽力而为”业务的平... 详细信息

基于前跳虚时钟算法原理提出了一种新的调度算法 ,它将业务所预留的带宽和链路的剩余带宽实时分离 ,并用剩余带宽改善其他种类业务的 Qo S特性 ,使得带宽资源的分配更加灵活 .理论分析和仿真证明 ,算法不仅降低了“尽力而为”业务的平均时延 ,还具有确定的时延保证和公平性 .

关键词：前跳虚时钟调度算法时延保证宽带网络服务质量带宽分配通信业务

BCH信道编码对快跳频光码分多址系统性能的改善

在线全文

学校读者我要写书评

暂无评论

上海交通大学学报 2003年第3期37卷 359-361页

作者：吉建华范戈上海交通大学区域光纤通信网与新型光通信系统国家重点实验室上海200030

分析了单重合码的互相关性能 ,得出了未编码的快跳频光码分多址 ( FFH- OCDMA)系统误码率性能的具体表达式 .论述了 BCH信道编码对 FFH- OCDMA系统性能的影响 ,并将它和未编码的 FFH- OCDMA系统进行了比较 .结果表明 ,在相同的信息比特... 详细信息

分析了单重合码的互相关性能 ,得出了未编码的快跳频光码分多址 ( FFH- OCDMA)系统误码率性能的具体表达式 .论述了 BCH信道编码对 FFH- OCDMA系统性能的影响 ,并将它和未编码的 FFH- OCDMA系统进行了比较 .结果表明 ,在相同的信息比特速率、切普间隔、有效波长数时 ,两个系统的误码率性能基本相当 ,但使用 BCH信道编码后 ,单重合码的长度将变短 ,这样不仅降低了光纤光栅的制作难度 ,且增加了单重合码的码字数 ,从而提高了系统容量 .

关键词：快跳频光码分多址 BCH码单重合码误码率

在线全文

学校读者我要写书评

暂无评论

基于路径缓存的并发扩散式服务质量路由算法

上海交通大学学报 2002年第12期36卷 1754-1756,1760页

作者：王思兵李毓麟上海交通大学区域光纤通信网与新型光通信国家重点实验室上海200030

服务质量路由算法是一种多约束多目标的优化问题 ,该问题属于计算复杂度完全类 ( NP-Complete)问题 .基于一些扩散式服务质量路由算法 ,提出了一种基于路径缓存的并发扩散式服务质量路由算法 ( PCB- CFQR) ,该算法是一种分布式算法 ,它... 详细信息

服务质量路由算法是一种多约束多目标的优化问题 ,该问题属于计算复杂度完全类 ( NP-Complete)问题 .基于一些扩散式服务质量路由算法 ,提出了一种基于路径缓存的并发扩散式服务质量路由算法 ( PCB- CFQR) ,该算法是一种分布式算法 ,它将资源预留、接纳控制和路由选择进行有效的结合 ,能同时完成多个请求的路径建立 ,大大提高路由算法的效率 .分析和仿真结果表明 ,PCB- CFQR算法具有较强的稳定性和实时性 ,与最短最宽 ( WSP)路由算法相比 ,它无须进行路由信息的定时刷新 ,却具有较低的呼叫阻塞率 .

关键词：路径缓存并发扩散式服务质量路由算法计算复杂度完全类资源预留接纳控制路由选择 IP网络

基于Turbo编码和二进制脉冲位置调制的快跳频光码分多址系统

在线全文

学校读者我要写书评

暂无评论

上海交通大学学报 2003年第6期37卷 854-856,861页

作者：吉建华范戈上海交通大学区域光纤通信网与新型光通信系统国家重点实验室上海200030

在不考虑噪声和仅考虑散粒噪声两种情况下 ,分析了 Turbo码对二进制脉冲位置调制( BPPM)的快跳频光码分多址 ( FFH OCDMA)系统性能的影响 ,并对该系统进行了数值模拟 .结果表明 ,Turbo码对 BPPM调制的 FFH

关键词：快跳频光码分多址 Turbo码二进制脉冲位置调制