Quadrature phase-stabilized three-wavelength interrogation of a fiber-optic Fabry–Perot acoustic sensor

Qiang Liu, Zhenguo Jing, Yueying Liu, Ang Li, Yang Zhang, Zhiyuan Huang, Ming Han, Wei Peng

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

In this Letter, we propose a quadrature phase-stabilized three-wavelength demodulation technique for the interrogation of fiber-optic Fabry–Perot acoustic sensors. It is based on accurate and fast tuning of a monolithic modulated grating Y-branch laser. Three quadrature wavelengths are chosen to perform high-speed cavity length demodulation by wavelength switching, thereby avoiding imbalances and disturbances between the three optical paths in conventional three-wavelength quadrature phase-demodulation systems. A feedback-stabilization scheme for maintaining the quadrature phase condition is proposed for the first time, to the best of our knowledge, providing potential for long-term monitoring in harsh environments.

Original languageEnglish (US)
Pages (from-to)5402-5405
Number of pages4
JournalOptics Letters
Volume44
Issue number22
DOIs
StatePublished - Nov 15 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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