Optical fiber distributed vibration sensing system using time-varying gain amplification method

Zhengxian Zhou; Songlin Zhuang

doi:10.1117/1.OE.53.8.086107

18 August 2014 Optical fiber distributed vibration sensing system using time-varying gain amplification method

Zhengxian Zhou, Songlin Zhuang

Author Affiliations +

Optical Engineering, Vol. 53, Issue 8, 086107 (August 2014). https://doi.org/10.1117/1.OE.53.8.086107

Abstract

A time-varying gain amplification method is proposed and demonstrated in an optical fiber distributed vibration sensing system based on a phase-sensitive optical time-domain reflectometer. An acoustic optical modulator is adopted to generate narrow pulses, which are injected to the sensing fiber to generate Rayleigh backscattering light. The experimental results show that a 5-m spatial resolution and up to 44-km sensing range with 50-ns pulse width are achieved. The amplitude of vibrations is equal in three positions including 804, 20,054, and 43,455 m.

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Zhengxian Zhou and Songlin Zhuang "Optical fiber distributed vibration sensing system using time-varying gain amplification method," Optical Engineering 53(8), 086107 (18 August 2014). https://doi.org/10.1117/1.OE.53.8.086107

Published: 18 August 2014

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