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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 30, Iss. 11 — Jun. 1, 2005
  • pp: 1282–1284

Multiwavelength Raman-fiber-laser-based long-distance remote sensor for simultaneous measurement of strain and temperature

Young-Geun Han, T. V. A. Tran, Sang-Hyuck Kim, and Sang Bae Lee  »View Author Affiliations


Optics Letters, Vol. 30, Issue 11, pp. 1282-1284 (2005)
http://dx.doi.org/10.1364/OL.30.001282


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Abstract

We propose a simple and flexible multiwavelength Raman-fiber-laser-based long-distance remote-sensing scheme for simultaneous measurement of strain and temperature by use of fiber Bragg gratings. By combining two uniform fiber Bragg gratings with a tunable chirped fiber grating, we readily achieve simultaneous two-channel sensing probes with a high extinction ratio of more than ∼50 dB over a 50-km distance. When strain and temperature are applied, lasing wavelength separation and shift occur, respectively, since the two uniform fiber Bragg gratings have identical material composition and different cladding diameters. This allows simultaneous measurement of strain and temperature for long-distance sensing applications of more than 50 km.

© 2005 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors

Citation
Young-Geun Han, T. V. A. Tran, Sang-Hyuck Kim, and Sang Bae Lee, "Multiwavelength Raman-fiber-laser-based long-distance remote sensor for simultaneous measurement of strain and temperature," Opt. Lett. 30, 1282-1284 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-11-1282

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