Digitalized phase demodulation scheme of φ-OTDR based on cross-coherence between Rayleigh back-scattering beat signals

Yang Y.; Sun A.; Fan T.Li Q.

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Digitalized phase demodulation scheme of φ-OTDR based on cross-coherence between Rayleigh back-scattering beat signals

机译：Digitalized phase demodulation scheme of φ-OTDR based on cross-coherence between Rayleigh back-scattering beat signals

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? 2022 Elsevier Inc.In this paper, a simple and low-cost phase demodulation scheme for phase sensitive optical time domain reflectometer (φ-OTDR) sensing system is proposed and investigated. By utilizing simulated coherence between different back-scattering beat signals, digital phase demodulation for vibration detection can be achieved without employing hardware phase demodulation components. Experiments were conducted and the results demonstrated that the vibration induced phase change within different lengths of sensing optical fiber can be obtained sensitively by the proposed digital processing demodulation scheme that effectively avoid the noise caused by the hardware and reduce the complexity of the distributed optical fiber sensing system.

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来源
《Optical fiber technology》 |2022年第7期|102896.1-102896.6|共6页
作者
Yang Y.; Sun A.; Fan T.Li Q.;
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作者单位

School of Physics Northwest University;

State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences||University of Chinese Academy of Sciences;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
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关键词
Digitalized phase demodulation; Simulated cross coherence; Vibration detection; φ-OTDR;

Digitalized phase demodulation scheme of φ-OTDR based on cross-coherence between Rayleigh back-scattering beat signals

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