A Novel Fiber Bragg Grating Accelerometer Based on Fiber Vibrating Wire

A fiber Bragg grating (FBG) accelerometer based on fiber vibrating wire is presented. Finite element analysis has been done and experiments are carried out to demonstrate the performance of this FBG accelerometer. The seismic simulation experimental results indicate that the system has a good response to the 50–400 Hz vibration signal. What more, the accelerometer has a high sensitivity which can reach 108.6 pm/G at 100Hz. The linear responsivity and repeatability are also tested. The responsivity error is less than 2.5% and repeatability error is less than 0.03%. There is an extremely linear relationship between amplitude of detected signal and acceleration.