Distributed acoustic sensing using dynamic range suppression

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United States of America Patent

PATENT NO 12055803
APP PUB NO 20210356776A1
SERIAL NO

17316621

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Aspects of the present disclosure describe improved distributed acoustic sensing using dynamic range suppression of optical time domain reflectometry either by using a feedback loop comprising optical and electrical elements or using a nonlinear element in the electrical domain after coherent detection. When using a feedback loop, the amplitude of the periodic waveform of coherent OTDR can be inverted. This allows optical pre-compensation of the received optical signal before coherent detection with the goal of minimizing amplitude dynamic range. Alternatively, a nonlinear element in the electrical domain can reduce amplitude dynamic range before sampling by analog-to-digital converters (ADC).

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Patent OwnerAddress
NEC CORPORATION108-8001 TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huang, Yue-Kai Princeton, US 68 482
Ip, Ezra West Windsor, US 50 222
Ji, Philip Cranbury, US 46 230
Murakami, Shuji Monmouth Junction, US 71 780

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