Exploiting dispersion of higher-order-modes using M-type fiber for application in mid-infrared supercontinuum generation

M-type fibers have the exceptional property that the higher-order LP 0n modes are core-confined and easily excited, while the LP 01 and other modes are confined to a high-index ring surrounding the core, so they are not easily excited. This has profound consequences for mid-infrared supercontinuum s...

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Bibliographic Details
Published in:Scientific reports 2019-06, Vol.9 (1), p.8536-8536, Article 8536
Main Authors: Jain, D., Markos, C., Benson, T. M., Seddon, A. B., Bang, O.
Format: Article
Language:English
Subjects:
639/624/1020/1086
639/624/1075/187
Fibers
Humanities and Social Sciences
multidisciplinary
Photonics
Science
Science (multidisciplinary)
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Summary:M-type fibers have the exceptional property that the higher-order LP 0n modes are core-confined and easily excited, while the LP 01 and other modes are confined to a high-index ring surrounding the core, so they are not easily excited. This has profound consequences for mid-infrared supercontinuum sources, where the high zero-dispersion wavelength of chalcogenide and ZBLAN fibers means that exotic pump sources have so far been necessary. We show here that in chalcogenide and ZBLAN M-type fibers the lower ZDW of the core-confined higher-order LP 02 mode can be in the range of 2 to 3 µm (around 1.55 µm), while the fiber still has a large core diameter and thus supports high average power. This will allow established pump laser technology to be used in future high-power mid-infrared supercontinuum sources.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-44951-4