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Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection

Riccardo Piccoli, Thierry Robin, Thomas Brand, Udo Klotzbach, Stefano Taccheo Orcid Logo

Optics Express, Volume: 22, Issue: 7, Start page: 7638

Swansea University Author: Stefano Taccheo Orcid Logo

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DOI (Published version): 10.1364/OE.22.007638

Abstract

Al-silicate fibers have excellent manufacturing quality. Unfortunately, high-Yb doping concentration may be limited by severe losses induced by photodarkening phenomenon. In this paper we demonstrate for the first time that Al-silicate Yb-doped fibers with high-inversion and doping concentration abo...

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Published in: Optics Express
ISSN: 1094-4087
Published: 2014
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URI: https://cronfa.swan.ac.uk/Record/cronfa21338
first_indexed 2015-05-13T02:11:57Z
last_indexed 2018-04-12T18:40:42Z
id cronfa21338
recordtype SURis
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spelling 2018-04-12T16:07:45.4175669 v2 21338 2015-05-12 Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection ab5f951bdf448ec045d42a35d95dc0bf 0000-0003-0578-0563 Stefano Taccheo Stefano Taccheo true false 2015-05-12 Al-silicate fibers have excellent manufacturing quality. Unfortunately, high-Yb doping concentration may be limited by severe losses induced by photodarkening phenomenon. In this paper we demonstrate for the first time that Al-silicate Yb-doped fibers with high-inversion and doping concentration above 1 wt% can be successfully used by implementing a simple optical bleaching scheme. A co-injection into the active fiber of a few mW of light at around 550 nm wavelength successfully eliminates almost all photodarkening induced losses. We demonstrate operation at above 90% of the pristine output power level in several lasers with up to 30% Yb ions in the excited state. These results may allow using Yb-doped Al-silicate fibers with doping level increased by one order of magnitude. Finally, we provide a comprehensive picture of main parameters affecting photobleaching performance and, to the best of our knowledge, we report the first quantitative measurement of the Ytterbium excited state absorption cross-section in the visible range. Journal Article Optics Express 22 7 7638 1094-4087 7 4 2014 2014-04-07 10.1364/OE.22.007638 COLLEGE NANME COLLEGE CODE Swansea University 2018-04-12T16:07:45.4175669 2015-05-12T16:00:59.7338614 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Riccardo Piccoli 1 Thierry Robin 2 Thomas Brand 3 Udo Klotzbach 4 Stefano Taccheo 0000-0003-0578-0563 5
title Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection
spellingShingle Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection
Stefano Taccheo
title_short Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection
title_full Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection
title_fullStr Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection
title_full_unstemmed Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection
title_sort Effective photodarkening suppression in Yb-doped fiber lasers by visible light injection
author_id_str_mv ab5f951bdf448ec045d42a35d95dc0bf
author_id_fullname_str_mv ab5f951bdf448ec045d42a35d95dc0bf_***_Stefano Taccheo
author Stefano Taccheo
author2 Riccardo Piccoli
Thierry Robin
Thomas Brand
Udo Klotzbach
Stefano Taccheo
format Journal article
container_title Optics Express
container_volume 22
container_issue 7
container_start_page 7638
publishDate 2014
institution Swansea University
issn 1094-4087
doi_str_mv 10.1364/OE.22.007638
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 0
active_str 0
description Al-silicate fibers have excellent manufacturing quality. Unfortunately, high-Yb doping concentration may be limited by severe losses induced by photodarkening phenomenon. In this paper we demonstrate for the first time that Al-silicate Yb-doped fibers with high-inversion and doping concentration above 1 wt% can be successfully used by implementing a simple optical bleaching scheme. A co-injection into the active fiber of a few mW of light at around 550 nm wavelength successfully eliminates almost all photodarkening induced losses. We demonstrate operation at above 90% of the pristine output power level in several lasers with up to 30% Yb ions in the excited state. These results may allow using Yb-doped Al-silicate fibers with doping level increased by one order of magnitude. Finally, we provide a comprehensive picture of main parameters affecting photobleaching performance and, to the best of our knowledge, we report the first quantitative measurement of the Ytterbium excited state absorption cross-section in the visible range.
published_date 2014-04-07T03:40:44Z
_version_ 1851091105484898304
score 11.089407

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