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Quadrature phase-stabilized three-wavelength interrogation of a fiber-optic Fabry-Perot acoustic sensor
- Source :
- Optics letters. 44(22)
- Publication Year :
- 2019
-
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.
- Subjects :
- Physics
White light interferometry
business.industry
02 engineering and technology
Grating
021001 nanoscience & nanotechnology
Laser
01 natural sciences
Atomic and Molecular Physics, and Optics
law.invention
Quadrature (astronomy)
010309 optics
Wavelength
Optics
Fiber optic sensor
law
0103 physical sciences
Demodulation
0210 nano-technology
business
Fabry–Pérot interferometer
Subjects
Details
- ISSN :
- 15394794
- Volume :
- 44
- Issue :
- 22
- Database :
- OpenAIRE
- Journal :
- Optics letters
- Accession number :
- edsair.doi.dedup.....961e7d48c067037612a8313646243d27