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20 April 1995 Photoinduced Fresnel reflectors for point-wise and distributed sensing applications
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Large, photoinduced refractive index changes on the order 10-2 can now be achieved in hydrogen-loaded, GeO2-doped optical fiber. Much of this work has focused on the research and development of Bragg gratings fabricated by exposing the core of fiber to the intensity pattern of two interfering plane waves. Unlike interferometrically formed Bragg gratings, we have exposed optical fibers to a single focused 244 nm laser beam to obtain two Fresnel reflections from each exposure site. Reflectors formed in this way are broadband and have application as markers in OTDR-based distributed sensing systems and as resonant cavities for localized intrinsic Fabry-Perot interferometric strain and temperature sensors.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jonathan A. Greene, Tuan A. Tran, Kent A. Murphy, Angela J. Plante, Vikram Bhatia, Mallika B. Sen, and Richard O. Claus "Photoinduced Fresnel reflectors for point-wise and distributed sensing applications", Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995);

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