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 $\sim 50\mathrm{dB}$ 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

Long-distance simultaneous measurement of strain and temperature based on a fiber Raman laser with a single fiber Bragg grating embedded on a quartz plate

Thi VanAnh Tran, Young-Geun Han, Sang-Hyuck Kim, and Sang Bae Lee
Opt. Lett. 30(13) 1632-1634 (2005)

Development of a multiwavelength Raman fiber laser based on phase-shifted fiber Bragg gratings for long-distance remote-sensing applications

Young-Geun Han, T. V.A. Tran, Sang-Hyuck Kim, and Sang Bae Lee
Opt. Lett. 30(10) 1114-1116 (2005)

Investigation of a multiwavelength Raman fiber laser based on few-mode fiber Bragg gratings

Young-Geun Han, Sang Bae Lee, Dae Seung Moon, and Youngjoo Chung
Opt. Lett. 30(17) 2200-2202 (2005)

Investigation of Raman fiber laser temperature probe based on fiber Bragg gratings for long-distance remote sensing applications

Ju Han Lee, Junhee Kim, Young-Geun Han, Sang-Hyuck Kim, and Sang Bae Lee
Opt. Express 12(8) 1747-1752 (2004)

Raman amplifier-based long-distance remote, strain and temperature sensing system using an erbium-doped fiber and a fiber Bragg grating

Ju Han Lee, You Min Chang, Young-Geun Han, Haeyang Chung, Sang Hyuck Kim, and Sang Bae Lee
Opt. Express 12(15) 3515-3520 (2004)