Lasers are widely applied in such areas as ranging and sensing for good monochromaticity and energy concentration and linewidth is an important index for measuring laser monochromaticity.Therefore
it is of great significance to investigate the methods for measuring narrow linewidth.This paper systematically introduces several heterodyne-based methods for linewidth measurement and conducts the relevant experiments and comparative analysis.The results show that Michelson interferometer with Faraday rotator mirror is an ideal method for measuring narrow laser linewidth.
关键词
线宽测量马赫-曾德干涉仪迈克尔逊干涉仪光纤环行腔
Keywords
linewidth measurementM-Z interferometerMichelson interferometerfiber ring cavity