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Proceedings Paper

Photodarkening: investigation, mitigation and figure of merit
Author(s): Hrvoje Gebavi; Stefano Taccheo; Laurent LaBlonde; Benoit Cadier; Thierry Robin; Achille Monteville; Olivier Le Goffic; David Landais; David Méchin; Denis Tregoat; Daniel Milanese; Lasse Leick; Tim Durrant; Thomas Brandt
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Paper Abstract

This paper reviews and extends the work done on photodarkening by our project consortium and present our latest results on bleaching and photodarkening mitigation in fiber lasers. We shows the need for a standard set-up to avoid underestimation of photodarkening equilibrium losses and we suggest photodarkening losses scale with the square of Yb doping level. Investigation on visible light emission suggest an interplay of visible light with the Yb excited level. Finally we present an extensive investigation of photobleaching, both as post-irradiation and as simultaneous bleaching. We show evidence photobleaching can effectively mitigate the impact of photodarkening on laser performance when highly-doped Al-silicate fibers are used.

Paper Details

Date Published: 11 March 2013
PDF: 7 pages
Proc. SPIE 8621, Optical Components and Materials X, 86210W (11 March 2013); doi: 10.1117/12.2008184
Show Author Affiliations
Hrvoje Gebavi, Swansea Univ. (United Kingdom)
Stefano Taccheo, Swansea Univ. (United Kingdom)
Laurent LaBlonde, iXFiber SAS (France)
Benoit Cadier, iXFiber SAS (France)
Thierry Robin, iXFiber SAS (France)
Achille Monteville, PERFOS (France)
Olivier Le Goffic, PERFOS (France)
David Landais, PERFOS (France)
David Méchin, PERFOS (France)
Denis Tregoat, PERFOS (France)
Daniel Milanese, Politecnico di Torino (Italy)
Lasse Leick, NKT Photonics A/S (Denmark)
Tim Durrant, Gooch and Housego (United Kingdom)
Thomas Brandt, DILAS Diodenlaser GmbH (Germany)


Published in SPIE Proceedings Vol. 8621:
Optical Components and Materials X
Michel J. F. Digonnet; Shibin Jiang; J. Christopher Dries, Editor(s)

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