Open AccessFiber Bragg grating inscription combining DUV sub-picosecond laser pulses and two-beam interferometry
Author(s) -
Martin Becker,
J. Bergmann,
Sven Brückner,
Marco Franke,
Eric Lindner,
Manfred Rothhardt,
Hartmut Bartelt
Publication year - 2008
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.16.019169
Subject(s) - optics , fiber bragg grating , materials science , femtosecond , interferometry , laser , phosfos , grating , picosecond , optoelectronics , fiber laser , optical fiber , fiber optic sensor , polarization maintaining optical fiber , physics
The combination of fiber Bragg grating inscription with femtosecond laser sources and the usage of the Talbot interferometer setup not only gives access to the fabrication of Bragg gratings in new types of materials but also allows, at the same time, to keep the high flexibility of an interferometric setup in choosing the Bragg grating wavelength. Since the spatial and temporal coherence properties of the femtosecond laser source differ strongly from those of conventional laser sources, specific limits and tolerances in the interferometric setup have to be considered. Such limits are investigated on the basis of an analytical ray tracing model. The results are applied to tolerance measurements of fiber Bragg grating reflections recorded with a DUV sub-picosecond laser source at 262 nm. Additionally we demonstrate the wavelength versatility of the two-beam interferometer setup for femtosecond inscription over a 40 nm wavelength band. Inscription experiments in Al/Yb doped silica glasses are demonstrated as a prove for the access to non-photosensitive fibers.