摘要
采用F-P可调滤波器对长周期光纤光栅的某级透射谱进行波长扫描,借助探测器和示波器对信号光波在驱动信号周期内所形成的负脉冲间隔进行测量,实现信号解调。利用此系统对蔗糖溶液浓度从0到饱和进行测量,测得系统传感灵敏度的实验值为0.02 ms Lg-1。
A novel technique for LPFG sensor signal demodulation is introduced. The wave- length-shift of sensor grating affected by the measured concentration is converted into variation of time-interval between negative-going pulses that is scanning by F-P tunable filter controlled by PZT. The sensing sensitivity of this system was demonstrated to be 0.02 ms Lg^-1 , experimentally.
出处
《光电子技术》
CAS
北大核心
2010年第1期26-28,共3页
Optoelectronic Technology
基金
宁波市自然科学基金项目(2009A610067)
关键词
传感技术
长周期光纤光栅
浓度传感
F—P可调滤波器
解调
sensor technique
long period fiber grating
concentration sensor
F-P tunable filter
demodulation
