Using random fiber laser to suppress the noise in an interferometric optical fiber sensing system

Wentao Zhang; Peide Liu; Wenzhu Huang; Fang Li

doi:10.1117/12.2541256

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28 August 2019 Using random fiber laser to suppress the noise in an interferometric optical fiber sensing system

Wentao Zhang, Peide Liu, Wenzhu Huang, Fang Li

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Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111993B (2019) https://doi.org/10.1117/12.2541256
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

In this manuscript, we propose a new technique to suppress the noise level in an interferometric optical fiber sensing system. Previous work shows that laser frequency noise is the main factor that limits the resolution in a phase generated carrier (PGC) demodulation system. Using a bidirectional pumped random distributed feedback fiber laser (RDFL), the laser frequency noise can be suppressed from 30 Hz/√Hz to 4 Hz/√Hz above 1 kHz. Therefore, the wavelength resolution is improved from 5×10^-7 pm/√Hz@ 1 kHz to 5×10^-8 pm/√Hz@ 1 kHz.

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Wentao Zhang, Peide Liu, Wenzhu Huang, and Fang Li "Using random fiber laser to suppress the noise in an interferometric optical fiber sensing system", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111993B (28 August 2019); https://doi.org/10.1117/12.2541256

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