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Proceedings Paper

Raman-based distributed temperature sensor using a 1.66um ring type Q-switched fiber laser with adjustable pulsewidth
Author(s): Lei Zhang; Xue Feng; Qiang Zhou; Xiaoming Liu
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Paper Abstract

An optimized 1.66μm Q-switched fiber laser is demonstrated for Raman-based distributed temperature sensor. In a ring type Q-switched erbium-doped fiber laser, 850m TrueWave fiber is introduced to serve as both delay line fiber and Raman gain medium so that in addition to the wavelength shifted to 1.6μm, the pulse duration and the buildup time can be relatively extended. By properly controlling the fall edge of the acousto-optic switch, the pulse duration of 30-74ns with peak power of 1.3-3.3W is achieved. Based on this light source, a 2.4km Raman-based distributed temperature sensor is obtained with temperature resolution of 1°C and spatial resolution of 8m.

Paper Details

Date Published: 11 November 2008
PDF: 8 pages
Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 713429 (11 November 2008); doi: 10.1117/12.803198
Show Author Affiliations
Lei Zhang, Tsinghua Univ. (China)
Xue Feng, Tsinghua Univ. (China)
Qiang Zhou, Tsinghua Univ. (China)
Xiaoming Liu, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 7134:
Passive Components and Fiber-based Devices V
Ming-Jun Li; Ping Shum; Ian H. White; Xingkun Wu, Editor(s)

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