摘要
对基于非准直外腔的单频激光高阶回馈现象及产生机理进行了研究,获得了调制幅度不均匀的高分辨率多重高阶回馈条纹,分析了多重高阶回馈条纹的特点及产生机制。提出采用基于光路阻挡的实验方法,在回馈镜反射率大于90%的强回馈中,发现了单重高阶回馈效应,获得了调制幅度均匀、无大包络的高分辨率单重高阶回馈条纹,其分辨率达到λ/10,而且还有进一步提高的潜力。单重高阶回馈条纹不但具有多重高阶回馈时高分辨率的优点,还具有传统弱回馈时调制幅度均匀、类正弦等特性,对进一步研制高精度回馈测量系统具有重要意义。
Multiple-feedback phenomena and generation mechanism were studied systematically based on asymmetric external cavity.When the reflectivity of feedback mirror was higher than90%,the multiple high order feedback fringes were obtained owing to the stacking effect of many high order feedback beams going back to laser resonator.These feedback fringes have the features of unevenness and high resolution.Furthermore,the single high order feedback effects were discovered,and according to this,the light-path-blocking method was presented.The fringes of single high order feedback have the advantages of both evenness and high resolution ofλ/10,which is important for developing high accuracy measurement system.
出处
《应用光学》
CAS
CSCD
北大核心
2015年第2期305-309,共5页
Journal of Applied Optics
基金
国家自然科学基金资助项目(61405247)
关键词
单频激光
非准直外腔
单重高阶回馈
多重高阶回馈
single frequency laser
uncollimated external cavity
single high order feedback
multiple high order feedback
