Precise simultaneous measurement of temperature and strain using FBG-FPI on high birefringence fiber and narrow-ranged wavelength-sweep

点击翻译按钮获取中文摘要

A Fiber Bragg Gratings(FBG) have been used as a sensor head for measurement of temperature and static strain. However, a standard FBG sensor, which is constructed on single-mode fiber, cannot simultaneously measure both temperature and static strain since the sensor has cross-sensitivity between them. The cross-sensitivity problem can be solved by using an FBG constructed on a polarization maintaining fiber(PM-FBG) instead of a standard FBG. We have introduced an Fabry-Perot interferometer constructed with PM-FBG(PM-FBG-FPI) as a sensor head. This present us improvement on the sensing resolution for the simultaneous measurement of temperature and static strain.