Open AccessShort cavity single frequency fiber laser for in-situ sensing applications over a wide temperature range
Author(s) -
Yang Shen,
Yanqing Qiu,
Bo Wu,
Weixia Zhao,
Shuying Chen,
Tao Sun,
Kenneth T. V. Grattan
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.000363
Subject(s) - materials science , fiber laser , fiber bragg grating , optics , laser linewidth , laser , photonic crystal fiber , fiber , optoelectronics , dispersion shifted fiber , optical fiber , silica fiber , polarization maintaining optical fiber , fiber optic sensor , wavelength , composite material , physics
A novel Er-doped silica fiber, with heavy Er doping, was specially developed for application to a single frequency fiber laser. Two high temperature-sustainable fiber Bragg gratings, written into Bi-Ge codoped photosensitive fiber, were chosen for the application and spliced to the specialist Er doped silica fiber to form a compact, linear cavity, fiber laser. The fiber laser retained single mode oscillation over a wide temperature range, from room temperature to 400 degrees C. The wavelength of the laser output could be tuned smoothly, without mode hopping being observed, when the temperature was changed. A narrow linewidth of less than 1 kHz was measured at the output of fiber laser and this indicates the potential of the fibre laser sensing system with extremely high sensitivity and resolution over this wide range.