Open AccessLong period fiber gratings for the mitigation of parasitic laser effects in mid-infrared fiber amplifiers
Author(s) -
Maximilian Heck,
Janel Gauthier,
Andreas Tünnermann,
Réal Vallée,
Stefan Nolte,
Martin Bernier
Publication year - 2019
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.27.021347
Subject(s) - optics , materials science , supercontinuum , fiber laser , dispersion shifted fiber , fiber bragg grating , polarization maintaining optical fiber , optoelectronics , amplifier , photonic crystal fiber , long period fiber grating , grating , lasing threshold , optical fiber , fiber optic sensor , wavelength , physics , cmos
A concept to mitigate parasitic lasing in mid-IR fiber amplifiers using a single long period fiber grating is shown. Using tightly confined ultrashort laser pulses at 800 nm, a grating was directly inscribed into the core of an erbium doped fluoride glass fiber showing a strong attenuation down to -27 dB at desired wavelength. The concept reveals great potential to improve the average output power and attainable spectral range of low repetition rate in-amplifier supercontinuum generation.