摘要
根据长周期光纤光栅(LPFG)的温度和应变特性,从理论上设计了一种具有更高灵敏度的传感器。将两个具有不同包层参数和周期的长周期光纤光栅串联起来,构成光纤光栅传感器;并对其进行数值模拟,结果表明此传感器具有更高的温度和应变灵敏度,同时能实现双参数测量。对影响传感器灵敏度的因素进行了进一步分析,表明光栅包层参数、周期对灵敏度都有一定影响,在其他参数不变的情况下高阶模次的灵敏度高于低阶模次,这一结果能进一步提高灵敏度。
According to the strain and temperature sensitivities of long period gratings（LPFG）,a fiber optical sensor with higher sensitivity was developed.Two long-period fiber gratings with different cladding parameters and periods were in series.With detailed numerical simulation,it illustrated that this new sensor is more sensitive to temperature and strain which could be measured together.Further analysis for the factors affecting the sensitivity of the sensor indicated that the higher mode of coupling times is more sensitive than the lower one,which helps to improve the sensor’s sensitivity.
出处
《量子电子学报》
CAS
CSCD
北大核心
2015年第2期228-234,共7页
Chinese Journal of Quantum Electronics
基金
广西省自然科学基金(20101MS018)
桂林科学技术发展项目基金(20120104-18)
关键词
光电子学
长周期光纤光栅
温度特性
应变特性
传感
optoelectronics
long period fiber grating
temperature characteristics
strain characteristics
sensing
