32-channel ultra weak fiber Bragg grating demodulation system

Bo Lu; Zhihui Luo

doi:10.1117/12.2617185

26 July 2022 32-channel ultra weak fiber Bragg grating demodulation system

Bo Lu, Zhihui Luo

Proceedings Volume 12279, 2021 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 122790T (2022) https://doi.org/10.1117/12.2617185
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

A modular 32-channel ultra weak fiber Bragg grating (uw-FBG) demodulation system is proposed. This system includes an optical pulse generating unit, an optical circuit unit, a signal processing and control unit. The signal processing and control unit is developed with Xilinx ZYNQ-7020 SOC as the core to collect the data from the 250 MSPS high-speed AD chip, and obtain the position information of all uw-FBGs after calibrating each channel with C# host computer firstly. In the test mode, the signal processing and control unit controls the wavelength scanning of the optical pulse unit, coordinates the switching of 32 optical channels in the optical line, and demodulates and stores the grating wavelength changes on each channel in real time based on the embedded wavelength demodulation algorithm. The system is less than 13 W of the power consumption, the volume is 230 mm × 170 mm × 40 mm, the single channel sensing distance is greater than 10 km, and the number of gratings is greater than 5000. It truly has realized the massive sensing of uw-FBGs.

Citation Download Citation

Bo Lu and Zhihui Luo "32-channel ultra weak fiber Bragg grating demodulation system", Proc. SPIE 12279, 2021 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 122790T (26 July 2022); https://doi.org/10.1117/12.2617185

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