Spectroscopy of Erbium-doped LiYF4 crystalline layers grown by Liquid Phase Epitaxy

被引：0
|
作者：
Normani, Simone [1 ]
Loiko, Pavel [1 ]
Basyrova, Liza [1 ]
Brasse, Gurvan [1 ]
Benayad, Abdelmjid [1 ]
Braud, Alain [1 ]
Camy, Patrice [1 ]
机构：
[1] Univ Caen Normandie, UMR CEA CNRS ENSICAEN 6252, Ctr Rech Ions Mat & Photon CIMAP, 6 Blvd Marechal Juin, F-14050 Caen 4, France
来源：
FIBER LASERS AND GLASS PHOTONICS: MATERIALS THROUGH APPLICATIONS IV | 2024年 / 13003卷
关键词：
Liquid Phase Epitaxy; fluorides; erbium ions; luminescence; mid-infrared; CHANNEL WAVE-GUIDE; MICROCHIP LASERS; SLOPE EFFICIENCY; LU;
D O I：
10.1117/12.3016453
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on a detailed spectroscopic study of heavily Er3+-doped LiYF4 epitaxial layers with the goal of developing mid-infrared waveguide lasers. Layers with a doping level up to 11 at.% Er3+ were grown on (001) oriented undoped bulk LiYF4 substrates using LiF as a solvent. The absorption spectrum of Er3+ ions was measured. Under excitation at 973 nm, the layers exhibited intense and strongly polarized mid-infrared luminescence spanning from 2.65 to 2.90 mu m related to the I-4(11/2) -> I-4(13/2) Er3+ transition. The peak stimulated-emission cross-section at the expected laser wavelength was calculated to be 0.88x10(-20) cm(2) at 2809 nm for pi-polarization. By means of low-temperature (12 K) spectroscopy, the experimental crystal-field splitting of Er3+ multiplets was determined. The luminescence dynamics from Er3+ excited states were studied. For the 11 at.% Er3+ doping, the luminescence lifetimes of the I-4(13/2) and I-4(11/2) manifolds amounted to 5.54 ms and 2.66 ms, respectively.
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页数：7
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