Self-similarity of time evolution of photodarkening losses induced in Yb-doped fibers and photodarkening figure of merit

Stefano Taccheo; Hrvoje Gebavi; Achille Monteville; Olivier Le Goffic; Daniel Landais; David Mechin; Denis Tregoat; Benoit Cadier; Thierry Robin; Daniel Milanese; Tim Durrant

doi:10.1117/12.910382

15 February 2012 Self-similarity of time evolution of photodarkening losses induced in Yb-doped fibers and photodarkening figure of merit

Stefano Taccheo, Hrvoje Gebavi, Achille Monteville, Olivier Le Goffic, Daniel Landais, David Mechin, Denis Tregoat, Benoit Cadier, Thierry Robin, Daniel Milanese, Tim Durrant

Author Affiliations +

Proceedings Volume 8237, Fiber Lasers IX: Technology, Systems, and Applications; 82373D (2012) https://doi.org/10.1117/12.910382
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

In this paper we report and summarize an extensive investigation of photodarkening in Yb-doped silica fibers. We made a set of similar fibers in order to cover a large Yb concentration range. The results show that once uniform inversion is reached all along the test fiber it is possible to show self-similarity of the time evolutions. The stretching parameter has a little influence. We can therefore provide two unique numbers to define photodarkening performance: the saturation loss and the time scale parameter. We also propose a possible figure of merit to compare different fibers. This may allow to evaluate the impact of photodarkening on laser/amplifier devices.

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Stefano Taccheo, Hrvoje Gebavi, Achille Monteville, Olivier Le Goffic, Daniel Landais, David Mechin, Denis Tregoat, Benoit Cadier, Thierry Robin, Daniel Milanese, and Tim Durrant "Self-similarity of time evolution of photodarkening losses induced in Yb-doped fibers and photodarkening figure of merit", Proc. SPIE 8237, Fiber Lasers IX: Technology, Systems, and Applications, 82373D (15 February 2012); https://doi.org/10.1117/12.910382

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