A Novel Fiber Bragg Grating Temperature Compensated Strain Sensor

Abstract

This paper analyzed the strain-temperature cross sensitive characteristic of optical fiber Bragg grating(FBG) theoretically, designed and made a novel FBG strain sensor. It has a temperature-compensated function, and it improves the effect of being sensitive to strain. To a certain extent, this sensor overcame the traditional temperature-compensated methods easy to have a creep and aged phenomenon. The experimental results show that the sensor realized the temperature sensitivity reduces to 1/10 before the seal, and the strain sensitivity increases to 1.4 pm/uepsiv over the temperature range from -10degC to 50degC .