For still wider applications of Fiber Bragg Grating(FBG)in practical projects
this paper presents a FPGA-based high-speed demodulation algorithm and the implementation of its key technologies.It designs a signal demodulation hardware platform using the FPGA technology
implemets the accurate positioning of the FBG reflective spectral peak values using the low-complexity L-M fitting algorithm and increases the demodulation processing speed by simplifying the L-M algorithm.The test results show that this algorithm has good stability and repeatability and meets the requirements for high-speed