Enhancing the measurement range of a Brillouin-based fibre optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification
de Souza, Keith P. and Newson, Trevor P. (2004) Enhancing the measurement range of a Brillouin-based fibre optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification. In, Fiber Optic Sensor Technology and Applications III. Optics East 2004 Bellingham, USA, The International Society for Optical Engineering (SPIE), 325-336. (doi:10.1117/12.573259).
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We report on the use of a cost-effective erbium-doped based optical preamplifier in a single-ended distributed fiber-optic sensor to improve receiver sensitivity and hence measurement range. The improved accuracy of spontaneous Brillouin measurements was demonstrated in a 23km sensor and was limited by amplified spontaneous emission from the preamplifier, which was verified theoretically. Reduction of amplified spontaneous emission was achieved with a 0.37nm in-fiber Bragg grating. A signal-to-noise improvement of 17dB was achieved and supported by theory, which translates to approximately 40km range improvement for a single-mode sensing fiber having losses of 0.2dB/km at 1550nm.
|Item Type:||Book Section|
|Subjects:||Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||University Structure - Pre August 2011 > Optoelectronics Research Centre
|Date Deposited:||10 Aug 2007|
|Last Modified:||01 Oct 2012 15:20|
|Contributors:||de Souza, Keith P. (Author)
Newson, Trevor P. (Author)
|Publisher:||The International Society for Optical Engineering (SPIE)|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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