Photodarkening: investigation, mitigation and figure of merit

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

doi:10.1117/12.2008184

11 March 2013 Photodarkening: investigation, mitigation and figure of merit

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

Author Affiliations +

Proceedings Volume 8621, Optical Components and Materials X; 86210W (2013) https://doi.org/10.1117/12.2008184
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

Citation Download Citation

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, and Thomas Brandt "Photodarkening: investigation, mitigation and figure of merit", Proc. SPIE 8621, Optical Components and Materials X, 86210W (11 March 2013); https://doi.org/10.1117/12.2008184

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