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22 December 1993 Mach-Zehnder fiber interferometers for sensing applications incorporating photoinduced mode coupling filters in elliptical-core high-birefringence fibers
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Abstract
Photogenerated mode coupling filters for temperature and strain sensing are described. Mach- Zehnder fiber interferometers have been fabricated in elliptical-core, high-birefringence fibers where the directional couplers of a conventional fiber interferometer are replaced by two polarization rocking filters written on the same fiber. One interferometer having an operational bandwidth of 18 nm was used as a temperature sensor with a measured sensitivity of 9.1 mrad/($DEGC cm). Photoinduced polarization couplers written with 266 nm light can survive temperatures of 200$DEGC. This allows development of a temperature sensor based on the shift of the resonant wavelength of the coupler with temperature. A scheme for the simultaneous measurement of strain and temperature based on the use of a Bragg grating and a mode coupling filter is proposed.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sotiris E. Kanellopoulos, Vincent A. Handerek, and Alan J. Rogers "Mach-Zehnder fiber interferometers for sensing applications incorporating photoinduced mode coupling filters in elliptical-core high-birefringence fibers", Proc. SPIE 2044, Photosensitivity and Self-Organization in Optical Fibers and Waveguides, (22 December 1993); https://doi.org/10.1117/12.165660
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