A fiber Bragg grating(FBG) sensing system based on InGaAs linear array detector is researched and realized.The characteristics and time sequence of the detector are analyzed.The drive circuit,data acquisition and transmission system for the detector are designed and realized with the application of FPGA.The dual-channel splitting algorithm is realized to obtain the spectrum profile from the original data,and the polynomial fitting algorithm is employed for peak search and calibration.The experim...