【作者】 张立军；

【导师】 吴重庆；

【作者基本信息】 北京交通大学 ， 光学工程， 2008， 硕士

【摘要】 全光缓存器能够在光域内对数据包进行缓存,解决数据包在节点的冲突问题,将会成为全光网的重要组成部分。本文提出了一种新型可擦写的全光缓存器,该缓存器在原有双环结构缓存器(Dual-loop optical buffer,DLOB)结构的基础上,引入了双-SOA(半导体光放大器,semiconductor optical amplifier)结构。此种结构的优点是:1、可以利用不同的控制光来完成信号的“写入/读出”控制。由于信号光在缓存器中环行时会发生功率的变化,将会导致其对“读出”控制光的功率的要求发生变化,而此种结构的缓存器可以单独地调节“写入/读出”控制光的功率,很好地解决了这个问题。2、双SOA结构的引入,使得信号从耦合器的不同端口“写入/读出”缓存器。解决了采用同一端口“写入/读出”信号光时存在的串扰问题;同时,有效地克服了由于数据包的”写入”动作而造成的信号光的“泄露”问题。3、在注入信号峰值功率相同的条件下,双SOA结构的采用还可以对信号光实现功率补偿,比利用单个SOA进行“写入/读出”控制延长了缓存时间。本文的主要工作有:1、在电路设计方面,提出了一种针对半导体器件的温度控制电路的设计方案。进行了详细的原理分析,并调试了实验电路。通过拟和方式得到了温控控制电路中采样电路中匹配电阻的确定。在温度误差仅为±0.03℃的同时,极大地简化了运算复杂度。2、提出了一种新型的可擦写结构的全光缓存器,针对其结构特性分析了控制光功率的确定;可缓存包长的限制;最后,理论上分析了此结构缓存器的缓存原理,“漏光”消除原理。3、搭建了全光缓存系统结构,成功进行了2.5Gb/s速率信号的多圈缓存实验,同时证明了理论的正确性。更多还原

【Abstract】 All-optical buffer becomes the key component in All-optical network which could buffer packets in optical domain and solves the packet-collision in optical switching node. This paper presents a novel erasable all-optical buffer which introduces a dual-semiconductor optical amplifier configuration on the basis of Dual -loop optical buffer, DLOB. The innovations of this configuration are as follows:1. Realizing the "read/write" control through different control laser. Because of the power distortion of the signal packet, different power of the control laser will be need .This configuration could adjust the "read/write" control laser separately which solves the problem successively.2. Dual-SOA configuration uses two ports to "write in" and "read ouf"signal packet separately .This overcomes the problem of signal "leakage" successively which introduced by the action of writing in signal packet.3. On the condition of same input signal power, Dual-SOA configuration compensates the signal power effectively and will enhance the storing time when compared to single-SOA configuration.What I have done are as follows:1. Introduce a temperature control circuit design. Analyze the temperature controltheory in detailed and debug the experiment circuit.A resistance-temperature fitting curve of the matching resistance is achieved forthe first time with the temperature error of±0.03℃which makes theexperiment simpler.2. Present a novel erasable all-optical buffer .Analyze the power need of the controllaser and packets length restriction on this Dual-SOA configuration .Analyze the buffering theory without signal "leakage".3. The 2.5 GB/s signal packets are read out successively after Multi-circle’s buffering which demonstrates the correctness of the theory at the same time.更多还原