Release Time:2019-12-07  Hits:

Indexed by: Journal Papers

Date of Publication: 2019-11-15

Journal: OPTICS LETTERS

Included Journals: EI、SCIE

Volume: 44

Issue: 22

Page Number: 5402-5405

ISSN: 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