斯托克斯脉冲波形对光纤中受激布里渊散射慢光的影响  

Influence of Stokes Pulse Shapes on SBS Slow Light in Fibers

作　　者：侯尚林[1] 李红兵[1,2] 黎锁平[1] 刘延君[1] 徐永钊[3] 

机构地区：[1]兰州理工大学理学院,甘肃兰州730050 [2]南通大学理学院,江苏南通226007 [3]东莞理工学院电子工程学院,广东东莞523808

出　　处：《光学学报》2011年第6期48-52,共5页Acta Optica Sinica

基　　金：甘肃省自然科学基金(1010RJZA036);兰州理工大学博士启动基金;广东省自然科学基金(10451170003004948)资助课题

摘　　要：为了提高受激布里渊散射慢光的延时和抑制脉冲展宽,通过四阶Runge-Kutta法和特征线法对基于光纤的受激布里渊散射耦合方程组进行数值求解,计算了斯托克斯脉冲边沿陡峭程度、功率、宽度对延迟时间以及脉冲展宽因子的影响,提出了在低频范围内适当提高斯托克斯脉冲的边沿陡峭程度,可以优化延时和脉冲展宽因子的方法。该方法可以获得与高斯脉冲近似相等的延时和很小的脉冲展宽因子。基于波形能量差异的理论分析也证实了提高边沿陡峭程度对抑制脉冲展宽有明显的影响。In order to increase time delay and decrease pulse broadening via stimulated-Brillouin scattering slow light, the coupled amplitude equations of stimulated Brillouin scattering in optical fibers are solved with fourth-order Runge-Kutta formula and characteristic-line mothod, the influence of the edge sharpness, magnitude and duration of injected Stokes pulse on time delay and pulse broadening factor are investigated. A method of optimizing time delay and pulse broadening factor is represented, namely, increasing the sharpness of Stokes pulse appropriately. Comparing with using Gaussian pulse as injected Stokes pulse, the similar time delay and less pulse broadening factor are obtained by this method. Theoretical analysis based on different power of injected Stokes pulse proves that improving the sharpness of injected Stokes pulse contributes a lot to reduce pulse broadening factor.

关 键 词：光纤光学 受激布里渊散射 慢光 脉冲展宽因子 

分 类 号：TN929.11[电子电信—通信与信息系统]