Grating enhanced distributed vibration demodulation system and method based on three-pulse shearing interference

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United States of America Patent

PATENT NO 12055433
APP PUB NO 20220326068A1
SERIAL NO

17580870

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Abstract

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The present invention discloses a grating enhanced distributed vibration demodulation system based on three-pulse shearing interference, comprising: a laser device, a pulse optical modulator, a three-pulse generation polarization-maintaining structure, a first erbium-doped fiber amplifier, a first optical circulator, a fiber grating array, a second erbium-doped fiber amplifier, a second optical circulator, a three-in-three optical coupler, a first Faraday rotator mirror, a second Faraday rotator mirror, and a four-channel data acquisition card, On the basis of a distributed fiber grating vibration sensing system, three-pulse dislocation interference and three-in-three optical coupler digital phase demodulation technologies are adopted, XX and XY pulses are utilized to complement interference visibility, and demodulation is performed by selecting a better path, so that polarization fading resistance and interference signal high visibility in the distributed fiber grating vibration sensing system are realized.

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Patent OwnerAddress
WUHAN UNIVERSITY OF TECHNOLOGY430070 HUBEI PROVINCE WUHAN CITY HONGSHAN DISTRICT LUOSHI ROAD NO 122 WUHAN CITY HUBEI PROVINCE 430070

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Deng, Zhenyu Wuhan, CN 3 2
Fu, Xuelei Wuhan, CN 2 0
Li, Zhengying Wuhan, CN 5 0
Wu, Jun Wuhan, CN 507 5138

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