光纤环形激光器的环内外光反馈效应  

Internal and External Optical Feedback in Fiber Ring Lasers

作　　者：周俊萍[1] 葛益娴[1] 

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《河南科技大学学报（自然科学版）》2013年第2期47-51,3,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：江苏省高校优势学科建设工程基金项目;江苏省光电技术重点实验室开放基金项目(1640706061-5)

摘　　要：提出了基于光纤环形激光器的环内、环外光反馈模型。系统中光反馈效应可等效为激光腔内损耗的变化,根据环内、环外两种结构分别推导得出系统输出功率变化表达式。建立数值模型对两种结构进行相应分析,得出其与传统的激光自混合干涉有着相同的相位灵敏度,并从试验中得出相一致的结果。比较环内、环外两种结构的输出现象,得到环内光反馈比环外光反馈具有更高的输出增益及条纹变化深度,即环内结构具有更好的传感特性。In this paper,models of internal and external optical feedback in fiber ring lasers were set up.The effects of optical feedback could be equivalent to the variation of laser cavity loss,and the output expressions of two models are deduced.According to the simulation results,the optical feedback system in fiber ring lasers has same phase sensitivity with the traditional self-mixing effect.The experimental results show a good agreement with the simulated results.By comparing the output of internal structure with that of external structure,the internal optical feedback can get higher output gain and stripe depth,which reveals that the internal structure has better sensing characteristics.

关 键 词：光纤光学 环内光反馈 环外光反馈 

分 类 号：TN201[电子电信—物理电子学] TN249