光学学报, 2008, 28 (11): 2077, 网络出版: 2008-11-17   

光纤中双宽带抽运SBS慢光及其脉冲展宽减小的理论研究

Theoretical Study of Stimulated Brillouin Scattering Slow Light and Pulse-Broadening Reduction Using Double Broadband Pump in Optical Fibers
刘宇 1,2,*任立勇 1王士鹤 1,2
作者单位
1 中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室, 陕西 西安 710119
2 中国科学院研究生院, 北京 100039
摘要
提出了一种单模光纤中采用双宽带抽运实现宽带受激布里渊散射(SBS)慢光的方法。给出了双宽带抽运的SBS慢光及其脉冲展宽的理论模型。色散分析发现, 两抽运光间存在一个最佳的频率间隔, 可有效地减少由于群速度色散所引起的脉冲展宽。理论计算表明, 该方案所获得的SBS增益带宽和信号脉冲群延迟分别提高到了相同条件下单宽带抽运的1.7倍和2倍。
Abstract
A method of realizing the wideband stimulated Brillouin scattering (SBS) slow light was proposed using double broadband pump in a single-mode optical fiber. The theoretical models of this double broadband pump SBS slow light and its pulse broadening are presented. Dispersion analyses indicate that there exists the optimum spectral separation between the central frequencies of the double pump beams with respect to the inherent spectral width of the pump laser, which makes it possible to effectively reduce the signal pulse broadening related to the group velocity dispersion. Theoretical calculations show that the SBS gain bandwidth and the signal pulse's group delay using the proposed scheme can respectively be enhanced to 1.7 and 2 times of those using just one single broadband laser of the two pump beams.

刘宇, 任立勇, 王士鹤. 光纤中双宽带抽运SBS慢光及其脉冲展宽减小的理论研究[J]. 光学学报, 2008, 28(11): 2077. Liu Yu, Ren Liyong, Wang Shihe. Theoretical Study of Stimulated Brillouin Scattering Slow Light and Pulse-Broadening Reduction Using Double Broadband Pump in Optical Fibers[J]. Acta Optica Sinica, 2008, 28(11): 2077.

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