摘要
基于马赫-曾德尔(Mach-Zehnder)干涉仪结构,构造了全保偏光纤传感系统,以单频窄线宽保偏光纤激光器作为光源,采用了光源光电负反馈和双光路平衡检测双重降噪方法,降低了光源的附加强度噪声,使系统信噪比(SNR)提高了约15 dB,达到60 dB。
A fiber sensor based on all polarization maintaining fiber Mach Zehnder interferometer is presented, in which the single-frequency polarization-maintaining optical fiber laser is used as a light source. An active feedback loop for laser source and a balanced-mixer receiver are adopted to suppress the noise of the sensor system. This system makes the intensity noise reduce about 15 dB, and the signal-to-noise ratio of the system is up to 60 dB.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2008年第5期726-728,共3页
Chinese Journal of Lasers
基金
安徽优秀青年科技基金(04042045)
安徽省高等学校青年教师科研"资助计划"基金(2005jq1027)资助项目
关键词
光纤光学
光纤传感器
双光路检测
光电负反馈
fiber optics
fiber sensor
twin-channel optic path balancing detection
photoelectric inverse feedback
