注入锁定法布里-珀罗激光器的单模工作特性  

Single Mode Operation of an Injection Locked Fabry-Perot Laser

作　　者：韩威[1] 张雅丽[1] 张艳[1] 任民[1] 李亮[1] 张红广[1] 谢亮[1] 祝宁华[1] 

机构地区：[1]中国科学院半导体研究所集成光电子国家重点联合实验室,北京100083

出　　处：《中国激光》2008年第9期1318-1322,共5页Chinese Journal of Lasers

基　　金：国家973计划(2006CB604902;2006CB302806);国家自然科学基金(60510173;60536010;60536006;60606019);科技部重大国际合作项目(2006DFA11880)资助课题

摘　　要：使用分布式反馈(DFB)激光器对法布里-珀罗(F-P)激光器进行单模注入锁定。通过改变F-P激光器的偏置电流,DFB激光器的输出功率以及两激光器间的波长失谐量,对注入锁定F-P激光器的光谱特性、功率特性以及频率响应特性进行实验分析,找出影响注入锁定F-P激光器稳定性的因素,并测量注入锁定F-P激光器的稳定锁定区;通过优化注入条件实现F-P激光器的高边模抑制比(SMSR)输出,最高可达55 dB;通过与自由运转F-P激光器比较,发现注入锁定可以明显抑制半导体激光器在高频调制下光谱的展宽。注入锁定后F-P激光器的3 dB调制带宽接近14 GHz。实验结果表明,通过合理设计光注入条件,注入锁定技术可以明显改善F-P激光器的光谱特性以及高频响应特性,并在高速光纤通信领域中得到广泛应用。A Fabry-Perot （F-P） semiconductor laser （FP-LD） was single mode injection locked by a distributed feedback semiconductor laser （DFB-LD）. The characteristics of optical spectrum, output power and frequency response were investigated by adjusting the bias current of the FP-LD, the output of the DFB-LD and the wavelength detuning between the master and the slave laser. The factors that affect the stability of injection locked FP-LD were analyzed. The stable range of injection locking was given. By optimizing the injection conditions, the side mode suppress ratio （SMSR） of the injection locked FP LD as high as 55 dB was demonstrated. Comparing with the free running FP LD, the injection locking technique can suppress the spread of the spectrum under high speed modulation. The 3 dB tuning bandwidth of 14 GHz was achieved. The results indicate that with injection locking the characteristic of optical spectrum and frequency response can be improved, by which the FP-LD can apply to the high speed fiber communication system.

关 键 词：激光器 光通信技术 法布里-珀罗半导体激光器 注入锁定 频率响应 

分 类 号：N248.4[自然科学总论]