Performance enhancement of long-distance simultaneouis measurement of strain and temperature based on a fiber Raman laser with an etched FBG

Authors
Tran, TVAHan, YGLee, HYJKim, SHLee, SB
Issue Date
2005-09
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE PHOTONICS TECHNOLOGY LETTERS, v.17, no.9, pp.1920 - 1922
Abstract
The performance enhancement of long-distance. remote simultaneous measurement of strain and temperature based on a fiber Raman laser is proposed and demonstrated by an etched fiber Bragg grating (FBG) fixed on a quartz plate. An all-FBG-based Raman fiber laser with a high extinction ratio of more than similar to 50 dB is clearly obtained. After reducing the cladding diameter of the FBG to enhance the strain sensitivity,its half segment is fixed firmly on a quartz plate to respond to temperature only, while the other half of the etched FBG is free to respond to both temperature and strain. The lasing wavelength shift and separation occur with the temperature and strain change, respectively. The strain sensitivity is significantly enhanced to be approximately 1.6 times higher than that of a conventional FBG. A simple and effective technique for simultaneous measurement of strain and temperature for long-distance sensing applications of more than 50 km is readily achieved.
Keywords
GRATING SENSORS; GRATING SENSORS; fiber Bragg gratings (FBGs); long-distance sensor; Raman laser; strain sensor; temperature sensor
ISSN
1041-1135
URI
https://pubs.kist.re.kr/handle/201004/136175
DOI
10.1109/LPT.2005.853519
Appears in Collections:
KIST Article > 2005
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