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Indexed by:Journal Papers

Date of Publication:2019-11-15

Journal:OPTICS LETTERS

Included Journals:SCIE、EI

Volume:44

Issue:22

Page Number:5402-5405

ISSN No.:0146-9592

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. (C) 2019 Optical Society of America