光学学报, 2011, 31 (3): 0323003, 网络出版: 2011-02-21
基于受激布里渊散射的新型多级慢光延时结构的研究
Research of a Novel Configuration of Optically Controlled Delays Based on Stimulated Brillouin Scattering
光通信 抽运光利用率 二级延时 受激布里渊散射 慢光 optical communications efficiency of the pump power two-line of delay stimulated Brillouin scattering slow light
摘要
设计了一种基于受激布里渊散射(SBS)的新型多级慢光延时结构。该多级延时结构将两段慢光延时介质用两个环形器相连接,使经过一级延时后剩余的抽运光经过环形器进入到第二段慢光延时介质中作为二级延时的抽运。该结构与传统的多级慢光延时结构相比,不需要为每段延时介质提供独立的抽运系统,结构简单,抽运光利用率高,延时效果显著。实验选用两段12 km的单模光纤构成两级延时结构,在抽运光功率为5.0 mW下,50 ns的脉冲信号经过一级慢光延时介质获得40.68 dB的布里渊增益和46.163 ns的延时,经过二级慢光延时介质后,最终获得了90.552 ns的延时,抽运光利用率达到96%。
Abstract
A novel configuration of multistage slow-light delay based on stimulated Brillouin scattering is presented. The two fiber segments of slow light delay are cascaded by two circulators in the configuration. The pump which propagates through the first-stage delay medium can launch into the second-stage delay medium through the circulator as the pump of the second delay line. Compared with the conventional configuration, the new one does not need separate pump for each delay medium, has simple structure, high pump efficiency, and good delay effect. When the delay configuration is made of two single-mode fibers which are 12 km long, under the pump power of 5.0 mW, 40.68 dB of Brillouin gain is achieved for the pulse signal of 50 ns, and the delay is up to 46.163 ns through the first section of single-mode fiber. Finally, 90.552 ns delay is obtained through the two segments of fiber, and the efficiency of the pump power is up to 96%.
杨秀峰, 李群, 童峥嵘, 姚斌, 李元, 赵军发, 刘艳格. 基于受激布里渊散射的新型多级慢光延时结构的研究[J]. 光学学报, 2011, 31(3): 0323003. Yang Xiufeng, Li Qun, Tong Zhengrong, Yao Bin, Li Yuan, Zhao Junfa, Liu Yange. Research of a Novel Configuration of Optically Controlled Delays Based on Stimulated Brillouin Scattering[J]. Acta Optica Sinica, 2011, 31(3): 0323003.