【作者】 邹四化；

【导师】 吴重庆；

【作者基本信息】 北京交通大学 ， 光学工程， 2010， 硕士

【摘要】 全光缓存器能够在光域内直接完成数据包的存储而不需要经过光-电-光的变换,有效克服了现存通信网络中的电子速率瓶颈,成为全光通信领域的研究热点。随着WDM网络技术的高速发展更是需要能够实现多波长信号缓存的全光缓存器。以半导体光放大器(SOA)为非线性元件的双环耦合全光缓存器(DLOB)是一种新型的全光缓存器,它具有结构紧凑、读写操作简单,可调范围大等优点。基于DLOB的多波长缓存系统也已经被提了出来,虽然成功实现了8个波长随机信号的缓存,但系统中仍存在着若干问题,限制了其工作性能。本文以前人的工作为基础,重新搭建了多波长信号缓存实验系统,对其中存在的若干问题提出了相应的解决方案并通过实验验证方案的可行性,最后利用该系统成功实现8个波长2.5Gps随机叠加信号的缓存。本文的主要工作包括：1.研究了多波长信号在SOA中的放大特性以及交叉增益特性,噪声特性；分析了SOA光开关对多波长叠加信号的功率均衡作用。2.研究了多波长信号缓存系统功率调节技术：利用反馈结构成功实现了对EDFA的增益和噪声控制,增加线性增益范围,进而改善了EDFA放大器的工作性能,解决了多波长信号缓存系统损耗问题；利用光纤光栅应力调节技术成功实现对光纤光栅反射波长的调节,提高了光栅的反射率并实现各个波长的功率的均衡,解决了光纤光栅的波长偏移问题。3.进行了多波长信号的缓存实验,成功实现了8×2.5Gbps4圈7.02us的缓存；简要分析了影响多波长信号缓存系统工作性能的原因。更多还原

【Abstract】 All-optical buffer can complete the storage of data packets in the optical domain without light-electricity-light transformation, overcoming the electronic speed bottleneck of the existing communication network effectively. It has become one of the research focuses of all-optical communications. With the rapid development of WDM network technology, optical buffer can be used for multi-wavelength is in need. The all-optical buffer based on dual loop optical buffer (DLOB) is a novel optical buffer, which is variable, compact, low cost and easy to operate. DLOB based multi-wavelength caching system has also been raised up, but there still were several problems. In this paper, based on previous work,we rebuilt a multi-wavelength signal buffering system based on DLOB, proposed some corresponding solutions to the problems existing in the system, and at last eight wavelengths 2.5Gps random overlapping signals simultaneous buffering has be achieved. The work of this paper includes:1. The multi-wavelength amplification characteristics, cross-gain and noise characteristics of SOA were studied carefully. The power equalization effect of multi-wavelength overlapping signals in SOA switch was studied theoretically and experimentally.2. Demonstrated the power control technologies of multi-wavelength signal buffering system. The EDFA gain and noise control was achieved by using feedback structure; the wavelengths of fiber grating were calibrated successful by using stress conditioning technology;3. Carried out multi-wavelength signal buffering experiment, successfully achieved 8×2.5Gbps 4 cycles 7.02us buffering; a brief analysis of the impact of multi-wavelength signal caching system performance reasons.更多还原