Tran, TVA Han, YG Lee, HYJ Kim, SH Lee, SB 2024-01-21T04:32:24Z 2024-01-21T04:32:24Z 2021-09-03 2005-09 1041-1135 https://pubs.kist.re.kr/handle/201004/136175 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. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC GRATING SENSORS Performance enhancement of long-distance simultaneouis measurement of strain and temperature based on a fiber Raman laser with an etched FBG Article 10.1109/LPT.2005.853519 1 IEEE PHOTONICS TECHNOLOGY LETTERS, v.17, no.9, pp.1920 - 1922 IEEE PHOTONICS TECHNOLOGY LETTERS 17 9 1920 1922 scie scopus 000231453500053 2-s2.0-27144490665 Engineering, Electrical & Electronic Optics Physics, Applied Engineering Optics Physics Article GRATING SENSORS fiber Bragg gratings (FBGs) long-distance sensor Raman laser strain sensor temperature sensor