https://doi.org/10.1051/epjconf/202328705010
Polarization-anisotropy of mid-infrared emission properties of Er3+ ions in YAlO3 crystal – INVITED
1 Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA-CNRS-ENSICAEN, Université de Caen Normandie, 6 Boulevard Maréchal Juin, 14050 Caen, France
2 Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 11 rue Pierre et Marie Curie, 75005 Paris, France
3 Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, 12489 Berlin, Germany
4 Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230031 Hefei, China
5 Department of Optoelectronic Engineering, Jinan University, 510632 Guangzhou, China
6 CORIA UMR6614, CNRS-INSA-Université de Rouen Normandie, Normandie Université, 76801 Saint Etienne du Rouvray, France
* Corresponding author: pavel.loiko@ensicaen.fr
Published online: 18 October 2023
We report on a polarization-resolved study of mid-infrared emission properties of Er3+ ions in the orthorhombic YAlO3 crystal. For the 4I11/2 → 4I13/2 transition, σSE reaches 0.20×10-20 cm2 at 2919 nm (for light polarization E || c). Pump-induced polarization switching between the E || b and E || c eigen-states is observed in an 10 at.% Er:YAlO3 laser. Pumped by an Yb-fiber laser at 976 nm, this laser delivers 0.77 W at 2919 nm with a slope efficiency of 31.4% being close to the Stokes limit and a laser threshold of 33 mW.
© The Authors, published by EDP Sciences, 2023
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