Open AccessInvestigation of Raman fiber laser temperature probe based on fiber Bragg gratings for long-distance remote sensing applications
Author(s) -
Ju Han Lee,
Junhee Kim,
YoungGeun Han,
Sang-Hyuck Kim,
Sang Bae Lee
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.001747
Subject(s) - fiber bragg grating , materials science , optics , phosfos , laser , fiber laser , raman spectroscopy , fiber optic sensor , temperature measurement , sensitivity (control systems) , optical fiber , optoelectronics , photonic crystal fiber , polarization maintaining optical fiber , physics , wavelength , quantum mechanics , electronic engineering , engineering
We demonstrate a practical and simple, all fiber Bragg grating (FBG) based Raman laser sensing probe for long-distance, remote temperature sensing application. Using multiple laser cavities based on FBG's and a tunable chirped FBG, we obtain the simultaneous multi-channel remote temperature sensing operation at a 50 km distance. The temperature sensitivity is measured to be 7.15 pm/ degrees C.