Fiber grating sensing demodulation method and devices based on microwave photon filters
A fiber grating, microwave photonic technology, applied in the direction of using optical devices to transmit sensing components, optics, instruments, etc., can solve the problems of high cost, multi-optical filters, high performance requirements of optical filters, and reduce cost and complexity. Effect
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[0017] like figure 1 As shown, the structure of the fiber grating sensing demodulation device based on the microwave photonic filter is: the broadband light source 1 is optically connected to the first port of the three-port optical circulator 2, and the second port of the three-port optical circulator 2 is connected to the sensor One end of the fiber Bragg grating 3 is optically connected, the third port of the three-port optical circulator 2 is optically connected to the input end of the electro-optic modulator 5, the output end of the electro-optic modulator 5 is optically connected to the input end of the fiber amplifier 6, and the electro-optic modulator The electric drive port of 5 is electrically connected with the signal source 4, the output port of the optical fiber amplifier 6 is optically connected with the input port of the Sagnac ring, the output port of the Sagnac ring is optically connected with the input port of the photodetector 11, and the photoelectric The o...
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