激光线宽对光纤受激布里渊散射阈值的影响  

Effect of laser linewidth on threshold of stimulated Brillouin scattering in optical fiber

作　　者：张永宁[1,2] 张明江[1,2] 刘毅[1,2] 张建忠[1,2] 刘慧[1,2] 王云才[1,2] 

机构地区：[1]新型传感器与智能控制教育部与山西省重点实验室,山西太原030024 [2]太原理工大学物理与光电工程学院,光电工程研究所,山西太原030024

出　　处：《深圳大学学报（理工版）》2016年第1期89-95,共7页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(61377089,61205142);山西省研究生教育创新项目(2015SY20)

摘　　要：理论分析了线宽对受激布里渊散射阈值的影响,使用噪声信号直接调制分布反馈半导体激光器构成可调线宽激光光源,搭建了受激布里渊散射阈值测量系统.结果表明,可调线宽激光的频谱与所使用的噪声信号的频谱类似,光谱与分布反馈半导体激光器输出光的光谱相比明显展宽.当可调线宽激光光源使用400 m V噪声信号进行调制时,长度为900 m单模光纤的受激布里渊散射阈值为616 m W,与使用DFB激光器测量的106 m W阈值相比,提高了7.6 d B.因此,可调线宽激光光源可以提高光纤的受激布里渊散射阈值,增加长距离光纤通信和光载电能传输系统中的光功率.The influence of laser linewidth on a stimulated Brillouin scattering threshold is analyzed theoretically,and a linewidth variable laser source made of noise-modulated distributed-feedback semiconductor laser is used in the stimulated Brillouin scattering threshold measurement system. Experimental results show that the power spectrum of the linewidth variable laser source is similar to that of the noise signal used in the experiment,and the optical spectrum is broadened significantly compared with that of the distributed-feedback semiconductor laser. When the noise amplitude used in the linewidth variable laser source raises from 0 to 400 m V,the threshold of stimulated Brillouin scattering in a 900 m single-mode fiber increases by 7. 6 d B,from 106 to 616 m W. Therefore the proposed method can be applied to increase the stimulated Brillouin scattering threshold effectively thus increasing the transmissionlight power in long-distance optical fiber communication system and the power over fiber system.

关 键 词：光纤非线性效应 受激布里渊散射 噪声调制 可调线宽激光光源 光纤通信 光载电能传输 

分 类 号：O437.2[机械工程—光学工程]