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Proceedings Paper

Mach-Zehnder fiber interferometers for sensing applications incorporating photoinduced mode coupling filters in elliptical-core high-birefringence fibers
Author(s): Sotiris E. Kanellopoulos; Vincent A. Handerek; Alan J. Rogers
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Paper 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.

Paper Details

Date Published: 22 December 1993
PDF: 11 pages
Proc. SPIE 2044, Photosensitivity and Self-Organization in Optical Fibers and Waveguides, (22 December 1993); doi: 10.1117/12.165660
Show Author Affiliations
Sotiris E. Kanellopoulos, King's College London (United Kingdom)
Vincent A. Handerek, King's College London (United Kingdom)
Alan J. Rogers, King's College London (United Kingdom)


Published in SPIE Proceedings Vol. 2044:
Photosensitivity and Self-Organization in Optical Fibers and Waveguides
Francois Ouellette, Editor(s)

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