Affiliation:
1. Shandong University
2. Vitebsk State Technological University
3. Belarusian State University of Informatics and Radioelectronics
4. Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
Abstract
We report on the first, to the best of our knowledge, laser operation on the 4I11/2 → 4I13/2 transition of erbium-doped disordered calcium lithium niobium gallium garnet (CLNGG) crystals with broadband mid-infrared emission properties. A 41.4 at.% Er:CLNGG continuous-wave laser generated 292 mW at 2.80 µm with 23.3% slope efficiency and a laser threshold of 209 mW. Er3+ ions in CLNGG feature inhomogeneously broadened spectral bands (σSE = 1.79 × 10−21 cm2 at 2.79 µm; emission bandwidth, 27.5 nm), a large luminescence branching ratio for the 4I11/2 → 4I13/2 transition of 17.9%, and a favorable ratio of the 4I11/2 and 4I13/2 lifetimes, exhibiting values of 0.34 ms and 1.17 ms (for 41.4 at.% Er3+), respectively.
Funder
Agence Nationale de la Recherche
Région Normandie
European Regional Development Fund
Contrat de plan État-Région (CPER) de Normandie
National Natural Science Foundation of China
Qilu Young Scholar Program of Shandong University
Subject
Atomic and Molecular Physics, and Optics
Cited by
4 articles.
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