摘要
针对光纤激光传感器信号解调过程中干涉仪输出干涉条纹可见度受输入光偏振态变化和两臂单模光纤双折射效应的影响,介绍了一种简单的光纤干涉仪消除偏振衰落技术,通过在M ichelson光纤干涉仪上加2个法拉第旋转镜来提高输出条纹可见度。使用琼斯矩阵法对干涉仪系统进行理论计算,证明法拉第旋转镜旋转角度在理想的45°附近时能达到很好的消偏振衰落效果,并通过实验进行了有效的验证。
Aiming at the visibility of interferential stripe output of interferometer is affected by the polarization state＇ s transformation of input light and double refraction of single mode fiber with two arms during the course of signal demodulation of fiber laser sensor, a polarization-induced fading elimination method of fiber interferometer is introduced. Two Faraday rotator mirrors are added into Miebelson fiber interferometer to improve visibility of stripe output. The Jones matrix is used to do theoretic calculation of the fiber interferometer system, which proves the polarization-induced fading can be eliminated when the rotator degrees of Faraday rotator mirrors are around 45°, and it is demonstrated effectively thragh experiments
出处
《传感器与微系统》
CSCD
北大核心
2008年第7期21-23,共3页
Transducer and Microsystem Technologies
基金
中国科学院科技创新基金资助项目(CXJJ-177)
关键词
光电子学
光纤激光传感器
光纤干涉仪
法拉第旋转镜
偏振控制
optoelectronics
fiber laser sensor
fiber-optic interferometer
Faraday rotator mirror
polarization controller
