光子晶体少模光纤中受激布里渊散射的慢光研究  

Research on slow light via stimulated Brillouin scattering in a photonic crystal few-mode fiber

作　　者：李丽君 谭小东 LI Lijun;TAN Xiaodong(Electronic Information and Electrical Engineering College,Shangluo University,Shangluo Shanxi 726000,China)

机构地区：[1]商洛学院电信学院,陕西商洛726000

出　　处：《光通信技术》2021年第9期49-53,共5页Optical Communication Technology

基　　金：国家自然科学基金(11847042、61665005)资助;商洛学院科学与技术项目(No.19SKY012)资助。

摘　　要：为进一步提高通信系统的传输容量,采用全矢量有限元法对光子晶体少模光纤进行优化,计算了光子晶体少模光纤中受激布里渊散射(SBS)各模式的光场分布及有效模场面积,模拟了泵浦功率对LP01模和LP11模的慢光延时及展宽因子的影响。结果表明:SBS阈值随光纤有效长度的增加而逐渐减小;相同条件下,LP01模的SBS阀值小于LP11模的SBS阀值,但LP01模的慢光延时大于LP11模;两模式的慢光延时及展宽因子随输入泵浦功率增加而线性增大。优化输入泵浦功率可得LP01模和LP11模的慢光延时分别为881 ns和533 ns,对应的展宽因子分别为1.453和1.293。In order to improve the transmission capacity of the optical fiber communication system,the photonic crystal few-mode fiber is optimized by full vector finite element method.The light field distribution and effective mode field area of stimulated Brillouin scattering (SBS) in the photonic crystal few-mode fiber are calculated,and the influences of pump power on slow light time delay and pulse broadening factor are also simulated.The results show that the SBS threshold decreases with the increase of fiber effective length;Under the same conditions,the SBS threshold of LP01mode is less than that of LP11mode,but the slow light time delay of LP01mode is greater than that of LP11mode;The slow light time delay and broadening factor of the two modes increase linearly with the increase of the input pump power.Optimizes the input pump power can be obtained that slow light time delay of LP01mode and LP11mode are respectively 881 ns and 533 ns,meanwhile the corresponding broadening factors are 1.453 and 1.293 separately.

关 键 词：声光耦合 光子晶体少模光纤 慢光 空分复用 受激布里渊散射 

分 类 号：TN929.11[电子电信—通信与信息系统]