摘要
采用纤芯弹光系数大于包层弹光系数的长周期光纤光栅,且在其包层外面涂覆一层随温度升高折射率减小的薄膜材料,同时采用线膨胀系数较大的金属封装光栅等三种增敏措施,可提高长周期光纤光栅温度传感器的灵敏度,测得其灵敏度系数为0.2375 nm/℃,温度分辨率小于0.1℃。
The sensitivity of long period fiber grating （LPFG） has been increased through three measures： using the LPFG whose core strain coefficient is larger than that of the cladding; coating a thin layer of film on the cladding, which the refractive index would decrease with increase of temperature; packaging the LPFG with metal that has larger linear expansion factor. The resulted temperature sensor shows a sensitivity coefficient of 0. 237 5 nm/℃ ,and a temperature resolution of less than 0.1 ℃.
出处
《光纤与电缆及其应用技术》
2008年第4期31-32,43,共3页
Optical Fiber & Electric Cable and Their Applications
关键词
长周期光纤光栅
谐振波长
温度传感器
灵敏度
long period fiber grating（LPFG）
resonant wavelength
temperature sensor
sensitivity
