摘要
介绍一种基于干涉解调技术的光纤光栅传感系统 ,用非平衡波长扫描迈克耳孙干涉仪将来自传感光栅的包含应变信息的波长信号变为相位信号 ,借助相位计显示的相位变化确定待测应变的大小。该传感系统具备分辨5 .5nε的能力 ,其灵敏度的实验值为 1.80° με,与预期值 1.83°
Based on the interferometric demodulation technique, a fiber Bragg grating sensor system employing an unbalance wavelength scanning Michelson interferometer to transpose the strain related spectral signal into phase signal is reported. The strain can be recovered by measuring the phase change of the signal with a phase-meter. Experiment demonstrated that the sensing sensitivity of this system with a resolution of 5.5 nε is 1.80° /με. It basically matches the prospected value of 1.83° /με.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2001年第8期987-989,共3页
Acta Optica Sinica
基金
香港研究资助局 (RGC)资助项目 (Polyu 5 12 3 97E)
关键词
光纤光栅
传感器
分辨率
干涉解调
fiber Bragg grating
sensor
sensing resolution
interferometric demodulation
