16 November 2004 Optical signal-to-noise enhancement of a single-ended fiber optic spontaneous Brillouin-intensity-based distributed temperature sensor
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Abstract
An optical preamplifier system consisting of a 27dB-gain erbium-doped fibre amplifier, a three-port circulator and a 47GHz bandwidth in-fibre grating has improved receiver sensitivity and consequently sensor range of a spontaneous Brillouin intensity based single-ended fiber-optic distributed temperature sensor. Optical signal-to-noise has improved by 17dB. Operating at 1533nm, a sensor with a range of 23km, spatial resolution of 1.8m, measurement time of 9 minutes and temperature resolution of 6K was implemented. The temperature resolution was attributed to contamination of the backscattered spontaneous Brillouin signal by the residual Rayleigh signal after optical filtering. The optical signal-to-noise is supported theoretically by considering asscociated noise sources.
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Keith P. De Souza, Keith P. De Souza, Trevor P. Newson, Trevor P. Newson, } "Optical signal-to-noise enhancement of a single-ended fiber optic spontaneous Brillouin-intensity-based distributed temperature sensor", Proc. SPIE 5579, Photonics North 2004: Photonic Applications in Telecommunications, Sensors, Software, and Lasers, (16 November 2004); doi: 10.1117/12.567488; https://doi.org/10.1117/12.567488
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