Long period fiber gratings for the mitigation of parasitic laser effects in mid-infrared fiber amplifiers

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 -...

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Bibliographic Details
Published in:Optics express 2019-07, Vol.27 (15), p.21347-21357
Main Authors: Heck, Maximilian, Gauthier, Jean-Christophe, Tünnermann, Andreas, Vallée, Réal, Nolte, Stefan, Bernier, Martin
Format: Article
Language:English
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.27.021347