Open AccessLaser action along and near the optic axis of a holmium-doped KY(WO_4)_2 crystal
Author(s) -
Romain Cattoor,
Inka ManekHönninger,
Daniel Rytz,
Lionel Canioni,
Marc Eichhorn
Publication year - 2014
Publication title -
optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.39.006407
Subject(s) - holmium , optics , slope efficiency , lasing threshold , materials science , laser , crystal (programming language) , optical axis , conical surface , doping , optoelectronics , fiber laser , physics , computer science , composite material , programming language , lens (geology)
We demonstrate the first (to our knowledge) quasi-three-level conical refraction laser operating at 2 μm, with 1.6 W of output power at 2074 nm, using a holmium-doped KY(WO4)2 crystal. A maximum slope efficiency of 52% has been achieved, along the optic axis with respect to the absorbed pump power. Furthermore, lasing operation around the optic axis has been performed. In this case, a maximum output power of 3 W has been reached, with a slope efficiency better than 70%, which are the best performances ever reported on this material.
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