基于级联相位调制器和光衰减器的光频梳产生研究  

Research on optical frequency comb generation based on cascaded phase modulator and optical attenuator

作　　者：卢智嘉[1] 王现彬[1] 杨蓓 LU Zhijia;WANG Xianbin;YANG Bei(Mechanical and Electrical College,Shijiazhuang University,Shijiazhuang,Hebei 050035,China)

机构地区：[1]石家庄学院机电学院,河北石家庄050035

出　　处：《光电子．激光》2022年第12期1240-1247,共8页Journal of Optoelectronics·Laser

基　　金：河北省高等学校技术研究项目(ZC2021248)资助项目。

摘　　要：提出了一种基于级联相位调制器和光衰减器的光频梳产生方案,建立了方案的理论模型并进行了系统验证,研究了射频(radio frequency,RF)信号幅度和光衰减器衰减系数对光频梳平坦度的影响。结果表明数值计算与实验结果一致性较好,通过调整RF驱动信号幅度和光衰减器衰减系数可产生梳线数量为15条、平坦度为0.8 dB,边模抑制比(side-mode suppression ratio,SMSR)为5.05 dB的光频梳。方案中引入滤波器后,在梳线数量保持不变的前提下,其平坦度和SMSR可分别提高62.5%和61.4%。An optical frequency comb generation scheme based on cascaded phase modulator and optical attenuator is proposed.The theoretical model of the scheme is established and verified systematically.Finally,the effects of radio frequency(RF)signal amplitude and optical attenuator attenuation coefficient on the flatness of optical frequency comb are studied.The results show that the numerical calculation is in good agreement with the experimental results.By adjusting the amplitude of RF drive signal and the attenuation coefficient of optical attenuator,a high-performance optical frequency comb with 15 comb lines,0.8 dB flatness and 5.05 dB side-mode suppression ratio(SMSR)can be generated.After the filter is introduced into the scheme,the flatness and SMSR can be increased by 62.5%and 61.4%respectively on the premise that the number of comb lines remains unchanged.

关 键 词：光频梳 相位调制器 光衰减器 平坦度 

分 类 号：TN929.11[电子电信—通信与信息系统]