Supercontinuum generation in As2S3 waveguides fabricated without direct etching

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We report a supercontinuum generation (SCG) in a waveguide that spontaneously forms without an etching process during the deposition of a core material on a preformed SiO2 substructure. The mechanism of dispersion control for this new, to the best of our knowledge, type of waveguide is analyzed by numerical simulation, which results in a design rule to achieve a target dispersion profile by adjusting the substructure geometry. SCG is experimentally demonstrated with a waveguide made of As2S3, chalcogenide glass, which has low material absorption over the mid-IR range. A dispersion-controlled waveguide with a length of 10 mm pumped with 77 pJ pulses at a telecommunication wavelength of 1560 nm resulted in a supercontinuum that extends by more than 1.5 octaves. (C) 2021 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2021-05
Language
English
Article Type
Article
Citation

OPTICS LETTERS, v.46, no.10, pp.2413 - 2416

ISSN
0146-9592
DOI
10.1364/OL.422606
URI
http://hdl.handle.net/10203/285594
Appears in Collection
PH-Journal Papers(저널논문)
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