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Optical Engineering • Open Access

Fiber ring laser sensor for strain-temperature discrimination based on four-wave mixing effect

Paper Abstract

We present a new configuration based on a fiber ring laser sensor with four-wave mixing effect generation for simultaneous measurement of strain and temperature. The fiber ring laser sensor, corresponding to the signal wavelength, is based on an erbium-doped fiber amplifier, a highly nonlinear bismuth-based optical fiber, and a Bragg grating filter. Four-wave mixing is generated when an external pump laser is combined with a ring laser sensor. Two new peaks appear and are named the converted and satellite wavelengths. With efficiency conversion, which corresponds to the optical power ratio between the converted signal and ring laser input signal, and a Bragg wavelength it is possible to discriminate strain and temperature. Maximum errors of ±1.8° C and ± 12 με are reported over 100°C and 1000 με measurement ranges, respectively.

Paper Details

Date Published: 1 January 2007
PDF: 3 pages
Opt. Eng. 46(1) 010502 doi: 10.1117/1.2406065
Published in: Optical Engineering Volume 46, Issue 1
Show Author Affiliations
Orlando Frazão, Univ. do Porto (Portugal)
R. Morais, Instituto de Engenhariade Sistemas e Computadores do Porto (Portugal)
Jose Manuel Baptista, Instituto Superior de Engenharia do Porto (Portugal)
José Luis Santos, Instituto de Engenhariade Sistemas e Computadores do Porto (Portugal)


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