Strong excited state absorption (ESA) in Yb-doped fiber lasers

Magnus Engholm; Sara Rydberg; Krister Hammarling

doi:10.1117/12.2002957

22 March 2013 Strong excited state absorption (ESA) in Yb-doped fiber lasers

Magnus Engholm, Sara Rydberg, Krister Hammarling

Proceedings Volume 8601, Fiber Lasers X: Technology, Systems, and Applications; 86010P (2013) https://doi.org/10.1117/12.2002957
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

Excited state absorption (ESA) measurements performed on Yb-doped silica bers show the onset of a strong absorption band in the visible range. In this work, we perform experiments to investigate the possibility for ESA to be part of the induced optical losses (photodarkening) observed in Yb-doped ber lasers. Our results indicate that an ESA process, from the ²F_5/2 excited state manifold in the Yb³⁺ ion to the charge-transfer state with absorption bands in the UV range, may constitute a transfer route for pump- and laser photons in the near-infrared range.

Citation Download Citation

Magnus Engholm, Sara Rydberg, and Krister Hammarling "Strong excited state absorption (ESA) in Yb-doped fiber lasers", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86010P (22 March 2013); https://doi.org/10.1117/12.2002957

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