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

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Frazao, O (Author) Other; Morais, R (Author) Other; Baptista, JM (Author) Other; Santos, JL (Author) FCUP

Journal

Title: Optical Engineering

Vol. 46

Final page: 010502

ISSN: 0091-3286

Publisher: SPIE

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 5 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-004-E4C

DOI: 10.1117/1.2406065

Abstract (EN): 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 degrees C and +/- 12 mu epsilon are reported over 100 degrees C and 1000 mu epsilon measurement ranges, respectively. (c) 2007 Society of PhotoOptical Instrumentation Engineers.

Language: English

Type (Professor's evaluation): Scientific