摘要
对光纤光栅外腔反馈的高功率半导体激光器的光谱线宽特性进行了理论与实验研究。理论分析表明，根据不同的外腔参数，激光器的线宽能被压缩或展宽。外腔反射率对光谱线宽的影响要比外腔腔长灵敏得多。实验实现了激光器的线宽由６ｎｍ到０．８ｎｍ的压缩。光纤光栅外腔反馈不仅能改善高功率半导体激光器的光谱特性，而且可提高激光器主模对次模的抑制比。
Spectral characteristics of a high power laser diode with external fiber grating feedback are investigated both theoretically and experimentally. The theoretical results show that the spectral linewidth can be narrowed or broadened according to different external cavity parameters. The change of spectral linewidth is more sensitive to the effect of external reflection coefficient than the external cavity length. The reduction of spectral linewidth from 6 nm to 0.8 nm is achieved in our experiments. The external cavity with fiber grating feedback not only improves the spectral characteristics but also increases the repression ratio of dominant modes to subordinate modes.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1998年第12期1073-1077,共5页
Chinese Journal of Lasers
