Venkatesan Jambunathan, Simone Normani, Pavel Loiko, Karel Veselský, Liza Basyrova, Abdelmjid Benayad, Patrice Camy, Ammar Hideur, Alain Braud
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引用次数: 0
Abstract
The effect of rare-earth doping on the spectroscopy and mid-infrared laser performance of Er3+:CaF2 crystals was investigated. An optimum doping level of 3-5 at.% was identified owing to ion clustering. Pumped by a high-brightness Yb-fiber laser at 976 nm, a continuous-wave 5 at.% Er3+:CaF2 laser generated 1.22 W at 2798 nm with a slope efficiency of 38.3% exceeding the Stokes limit, and the laser wavelength was continuously tunable across 2690-2830 nm (tuning range: 140 nm). The ratio of energy-transfer upconversion rates from 4I11/2 and 4I13/2 states was quantified relating to the energy recycling process.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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