椭圆偏振激光抽运应变光纤的受激anti-Stokes拉曼散射  

Stress and Polarization-induced Stimulated anti-Stokes Raman Scattering in Optical Fiber

作　　者：杨鹏[1] 王业超 宦克为[2] YANG Peng;WANG Ye-chao;HUAN Ke-wei(Beijing Institute of Space Mechanics&Electricity,Beijing 100094;School of Science,Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]北京空间机电研究所,北京100094 [2]长春理工大学理学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2020年第4期14-18,共5页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省科技发展计划项目(20190701024GH)。

摘　　要：研究不同椭圆偏振激光抽运应变光纤产生的anti-Stokes拉曼光谱特征。0 Pa压力时,椭圆偏振光相差180°~360°,激发anti-Stokes光出现几率大于0°~180°的anti-Stokes光。对光纤施加水平单边压力,在一定的压力值下,两种椭圆偏振相差的anti-Stokes光出现几率几乎相等;进一步增大压力,破坏了光纤传输条件,高阶anti-Stokes光消失。椭圆偏振光相差与压力引起的光纤双折射,共同导致了频移和峰值半高全宽的变化。同时,高阶anti-Stokes光谱也存在缺级现象,拉曼响应时间、简并四波混频的出现及其响应时间是引起这种现象的根源。这为光纤激光中抑制、增强或选择某一阶anti-Stokes光谱提供了一种新方法。This paper studies anti-Stokes Raman spectral features of strained fiber pumped by different elliptically polarized laser.The anti-Stokes spectral probability of 180~360°phase difference is larger than that of 0~180°under 0Pa pressure.The probability of two kinds of phase difference is almost equal to each other under some pressure.The transmission conditions of fiber is damaged,high order anti-Stokes light is gone by increasing pressure.The phase difference resulted by elliptically polarized laser and optical fiber birefringence caused by pressure change the shift and FWHM of anti-Stokes spectrum.At the same time,there is a lack of order in the high order anti-Stokes spectra,because the response time of Raman and degenerate four wave mixing is the origin of this phenomenon producing.This paper provides a new method for restraining,enhancing or selecting a certain order of anti-Stokes spectrum in fiber laser.

关 键 词：非线性光学 反斯托克斯拉曼光谱 应变 光纤 

分 类 号：O437.3[机械工程—光学工程]