Room temperature fiber laser at 3.92 {\mu}m

Rare-earth-doped fiber lasers are promising contenders in the development of spectroscopy, free-space communications and countermeasure applications in the 3 - 5 {\mu}m spectral region. However, given the limited transparency of the commonly used fluorozirconate glass fiber, these systems have only...

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Bibliographic Details
Published in:arXiv.org 2018-04
Main Authors: Maes, Frédéric, tin, Vincent, Poulain, Samuel, Poulain, Marcel, Jean-Yves Carrée, Bernier, Martin, Vallée, Réal
Format: Article
Language:English
Subjects:
Cladding
Doped fibers
Fiber lasers
Glass fibers
Holmium
Infrared lasers
Lasers
Rare earth elements
Room temperature
Semiconductor lasers
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Summary:Rare-earth-doped fiber lasers are promising contenders in the development of spectroscopy, free-space communications and countermeasure applications in the 3 - 5 {\mu}m spectral region. However, given the limited transparency of the commonly used fluorozirconate glass fiber, these systems have only achieved wavelength coverage up to 3.8 {\mu}m, hence fueling the development of more suitable fiber glass compositions. To this extent, we propose in this Letter a novel heavily holmium-doped fluoroindate fiber, providing extended transparency up to 5 {\mu}m, to demonstrate the longest wavelength room temperature fiber laser at 3.92 {\mu}m. Achieving \(\approx\) 200 mW of output power when cladding pumped by a commercial 888 nm laser diode, this demonstration paves the way for powerful mid-infrared fiber lasers emitting at and beyond 4 {\mu}m.
ISSN:2331-8422