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Title: Effect of decreasing pressure on soliton self-compression in higher-order modes of a gas-filled capillary
Authors: Wan, Ying
Chang, Wonkeun
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Wan, Y. & Chang, W. (2021). Effect of decreasing pressure on soliton self-compression in higher-order modes of a gas-filled capillary. Optics Express, 29(5), 7070-7083.
Project: 2020-T2-2-026
Journal: Optics Express
Abstract: We numerically investigate soliton self-compression in the higher-order modes of a gas-filled capillary with decreasing pressure. We demonstrate four times enhancement in the compression with the decreasing pressure compared to the equivalent constant pressure case in the HE12 mode, reaching sub-cycle duration of 1.85 fs at its output. Moreover, the negative pressure gradient effectively suppresses the intermodal coupling in the later stage of the compressor, which helps to maintain high output mode purity. These findings are of direct benefit for applications that require ultrashort light pulses in unconventional spatial beam profiles, including in nonlinear frequency conversion, microscopy, micromachining, and particle manipulation.
ISSN: 1094-4087
DOI: 10.1364/OE.418217
Schools: School of Electrical and Electronic Engineering 
Rights: © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for noncommercial purposes and appropriate attribution is maintained. All other rights are reserved.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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