Multi-octave mid-infrared supercontinuum generation in tapered chalcogenide-glass rods

We report on the experimental development of short-tapered chalcogenide-glass rods for mid-infrared supercontinuum generation. Multi-octave spectral broadening of femtosecond laser pulses is demonstrated from 1.6 to 15.6 µm in a 5-cm-long tapered Ge20Se70Te10 rod with a waist diameter of 25 µm. Desp...

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Bibliographic Details
Published in:Optics letters 2023-11, Vol.48 (21), p.5479-5482
Main Authors: Serrano, Esteban, Bailleul, Damien, Désévédavy, Frédéric, Gadret, Grégory, Mathey, Pierre, Béjot, Pierre, Nakatani, Asuka, Cheng, Tonglei, Ohishi, Yasutake, Kibler, Bertrand, Smektala, Frédéric
Format: Article
Language:English
Subjects:
Chalcogenides
Femtosecond pulsed lasers
Femtosecond pulses
Optical waveguides
Optics
Physics
Rods
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Summary:We report on the experimental development of short-tapered chalcogenide-glass rods for mid-infrared supercontinuum generation. Multi-octave spectral broadening of femtosecond laser pulses is demonstrated from 1.6 to 15.6 µm in a 5-cm-long tapered Ge20Se70Te10 rod with a waist diameter of 25 µm. Despite the multimode nature of the optical waveguide used, this work clearly shows the potential of such simple post-processed rods for advancing fiber SC sources with infrared glasses, thereby unlocking new possibilities in terms of coupling efficiency, spectral coverage, and output power.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.501036