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25 September 1995 Rugate mirrors on optical fiber for sensor applications
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Proceedings Volume 2510, Fiber Optic and Laser Sensors XIII; (1995)
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany
An all-fiber Fabry-Perot interferometer using coherence demultiplexing and rugate mirror reflectors grown with electron cyclotron resonance plasma enhanced chemical vapor deposition (ECR-PECVD) on the fiber ends is proposed. The interferometer consists of a laser diode source, two optical fiber cavities, three rugate mirrors, a phase modulator and phase detection system. Coherence demultiplexing allowed the use of fiber cavities of several meters in length with a partially coherent illuminating light source. Truly inhomogeneous refractive index mirrors were designed taking into account dispersion and losses of SiOxNy at the required wavelength of 1.3 micrometers . The reflectance/transmittance ratio during growth were adjustable from 0.05/0.95 to 0.95/0.05 and mirrors used in the experimental interferometer had no inal reflectances of 40%, 68%, and 40% respectively. Design and fabrication procedures permit implementation of window functions and matching layers for flexible control over transmittance and reflectance charateristics. The long-cavity Fabry-Perot sensor was demonstrated for use as a strain gauge. Good agreement was shown with results obtained by a conventional strain gauge.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anatoli A. Chtcherbakov, Pieter L. Swart, Stephanus J. Spammer, and Pavel V. Bulkin "Rugate mirrors on optical fiber for sensor applications", Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995);

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