Open AccessHigh temperature sensing with fiber Bragg gratings in sapphire-derived all-glass optical fibers
Author(s) -
Tino Elsmann,
Adrian Lorenz,
Nazila Safari Yazd,
T. Habisreuther,
Jan Dellith,
Anka Schwuchow,
Jörg Bierlich,
Kay Schuster,
Manfred Rothhardt,
Ladislav Kido,
Hartmut Bartelt
Publication year - 2014
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.22.026825
Subject(s) - materials science , fiber bragg grating , optics , phosfos , femtosecond , photonic crystal fiber , graded index fiber , optical fiber , long period fiber grating , sapphire , fiber optic sensor , refractive index , all silica fiber , fiber laser , optoelectronics , plastic optical fiber , interferometry , fiber , laser , wavelength , composite material , physics
A structured sapphire-derived all-glass optical fiber with an aluminum content in the core of up to 50 mol% was used for fiber Bragg grating inscription. The fiber provided a parabolic refractive index profile. Fiber Bragg gratings were inscribed by means of femtosecond-laser pulses with a wavelength of 400 nm in combination with a two-beam phase mask interferometer. Heating experiments demonstrated the stability of the gratings for temperatures up to 950°C for more than 24 h without degradation in reflectivity.