摘要
研究了偏振分集技术消除干涉型光纤传感器中偏振衰落问题的基本原理及实现方法。理论分析表明,偏振二分集可大大缓解偏振衰落。搭建光纤传感系统对偏振二分集技术进行了实验验证,实验中单路最小可视度接近0,而偏振二分集得到的最小可视度为0.4。实验结果表明系统采用的相位载波调制解调技术实现了信号的稳定检测。
The basic principle and realizing method of polarization diversity receivers to eliminate polarization-induced fading in fiber optic interferometers are studied.Theoretical analysis shows that bi-state polarization diversity receiver can reduce polarization-induced fading.The optical fiber sensing system is built to test the bi-state polarization diversity receiver technique,with the minimum visibility of 0 at single way and 0.4 at bi-state polarization diversity receiver.The result shows that phase carrier demodulation technology adopted by the system can realize stable detection of the signal.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2011年第7期75-80,共6页
Acta Optica Sinica
基金
国家863计划(2006AA09Z121)资助课题
关键词
光纤光学
偏振衰落
偏振分集
光纤传感器
fiber optics
polarization-induced fading
polarization diversity receiver
fiber optic sensor
