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Proceedings Paper

Probe temperature sensor using elliptical-core dual-mode fiber
Author(s): George Z. Wang; Anbo Wang; Kent A. Murphy; Sridhar Gollapudi; Richard O. Claus
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Paper Abstract

A probe temperature sensor is constructed by attaching a long single mode fiber to a short (a few millimeters) dual mode elliptical core (e-core) fiber with an offset at the interface. The other endface of the e-core fiber is carefully polished to increase the reflectivity. The LP01 and LP11even modes are excited in the e-core fiber which establishes a spatial two-lobe intensity pattern within the fiber. A temperature variation on the e-core fiber oscillates these two-lobe intensity pattern which gives rise to an intensity variation of the reflected light in the single mode fiber. A resolution of 0.5 degree(s)C has been achieved over the range of 25 degree(s)C to 122 degree(s)C. By adjusting the length of the dual mode e-core fiber, the output of this sensor can be linearized.

Paper Details

Date Published: 5 March 1993
PDF: 5 pages
Proc. SPIE 1795, Fiber Optic and Laser Sensors X, (5 March 1993); doi: 10.1117/12.141252
Show Author Affiliations
George Z. Wang, Virginia Polytechnic Institute and State Univ. (United States)
Anbo Wang, Virginia Polytechnic Institute and State Univ. (United States)
Kent A. Murphy, Virginia Polytechnic Institute and State Univ. (United States)
Sridhar Gollapudi, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 1795:
Fiber Optic and Laser Sensors X
Eric Udd; Ramon P. DePaula, Editor(s)

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