Design and Application of Sensitivity Adjustable Fiber Bragg Grating Sensor

Abstract

In this paper, we use FBG (Fiber Bragg Grating) to measure the signal. At the first, we paste the FBG on an elastic-slice of cantilever beam, and setup onto the sensor. When this sensor affected by the external environment, it will makes the FBG center-wavelength shift. The length of this elastic-slice is adjustable in this paper. So, we can control the sensing sensitivity by adjust the length of elastic-slice to adapt the different environment. In this way, we reduce the practical application cost of sensor.