All-fiber ultrafast amplifier at 1.9 μm based on thulium-doped normal dispersion fiber and LMA fiber compressor

Abstract

The duration reduction and the peak power increase of ultrashort pulses generated by all-fiber sources at a wavelength of 1.9μm are urgent tasks. Finding an effective and easy way to improve these characteristics of ultrafast lasers can allow a broad implementation of wideband coherent supercontinuum sources in the mid-IR range required for various applications. As an alternative approach to sub-100 fs pulse generation, we present an ultrafast all-fiber amplifier based on a normal-dispersion germanosilicate thulium-doped active fiber and a large-mode-area silica-fiber compressor. The output pulses have the following characteristics: the central wavelength of 1.9μm, the repetition rate of 23.8 MHz, the energy per pulse period of 25 nJ, the average power of 600 mW, and a random output polarization. The pulse intensity and phase profiles were measured via the second-harmonic-generation frequency-resolved optical gating technique for a linearly polarized pulse. The linearly polarized pulse has a duration of 71 fs and a peak power of 128.7 kW. The maximum estimated peak power for all polarizations is 220 kW. The dynamics of ultrashort-pulse propagation in the amplifier were analyzed using numerical simulations.

Publication DOI: https://doi.org/10.1038/s41598-021-02934-4
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Funding Information: A.V. and D.B. are grateful for being funded by the Foundation for the support of young scientists named after Gennady Komissarov. All authors are grateful to the staff of Dianov Fiber Optics Research Center for providing the all fibers.
Additional Information: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Uncontrolled Keywords: General
Publication ISSN: 2045-2322
Last Modified: 22 May 2024 07:18
Date Deposited: 20 Dec 2021 10:28
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.nat ... 598-021-02934-4 (Publisher URL)
PURE Output Type: Article
Published Date: 2021-12-08
Accepted Date: 2021-11-24
Authors: Voropaev, Vasilii
Batov, Daniil
Voronets, Andrey
Vlasov, Dmitrii
Jafari, Rana
Donodin, Aleksandr (ORCID Profile 0000-0002-5715-1438)
Tarabrin, Mikhail
Trebino, Rick
Lazarev, Vladimir

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