Share Email Print
cover

Proceedings Paper

Long-distance remote simultaneous measurement of strain and temperature based on a Raman fiber laser with a single FBG embedded in a quartz plate
Author(s): Young-Geun Han; Thi Van Anh Tran; Ju Han Lee; Sang Bae Lee
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We propose and experimentally demonstrate long-distance, simultaneous measurement of strain and temperature based on a Raman fiber laser with a single FBG embedded on a quartz plate. Most of all, FBG based sensing technology has attracted considerable attention in the field of optical sensors since FBG based sensing probe can provide the most simple and attractive methods to monitor the external perturbation change like temperature, strain, and pressure due to its high sensitivity, electro-magnetic immunity, compactness, and ease of fabrication. In order to enhance the measurement resolution of sensing systems, fiber lasers based sensor schemes with narrow bandwidth and high extinction ratio have been considered as promising technologies. A novel and practical Raman laser based long-distance sensing scheme for simultaneous measurement of strain and temperature using FBGs is investigated. High-quality Raman laser output with a high extinction ratio of more than 50 dB is obtained at a long distance of over 50 km. Lasing wavelength shift and separation occur as the temperature and strain increase, respectively. To induce these phenomena, half of the FBG is fixed steadily on the quartz plate to respond to temperature only, while the other half of the FBG is free to respond to both temperature and strain. The temperature and strain sensitivities are measured to be 8.96 pm/oC and 1.47 pm/ustrain, respectively. This allows simultaneous measurement of strain and temperature for long-distance sensing applications of more than 50 km.

Paper Details

Date Published: 4 October 2006
PDF: 6 pages
Proc. SPIE 6351, Passive Components and Fiber-based Devices III, 635133 (4 October 2006); doi: 10.1117/12.691129
Show Author Affiliations
Young-Geun Han, Korea Institute of Science and Technology (South Korea)
Thi Van Anh Tran, Korea Institute of Science and Technology (South Korea)
Ju Han Lee, Korea Institute of Science and Technology (South Korea)
Sang Bae Lee, Korea Institute of Science and Technology (South Korea)


Published in SPIE Proceedings Vol. 6351:
Passive Components and Fiber-based Devices III
Sang Bae Lee; Yan Sun; Kun Qiu; Simon C. Fleming; Ian H. White, Editor(s)

© SPIE. Terms of Use
Back to Top