Spectroscopy of erbium-doped LiYF4 crystalline layers grown by liquid phase epitaxy

Simone Normani; Pavel Loiko; Liza Basyrova; Gurvan Brasse; Abdelmjid Benayad; Alain Braud; Patrice Camy

doi:10.1117/12.3016453

20 June 2024 Spectroscopy of erbium-doped LiYF4 crystalline layers grown by liquid phase epitaxy

Simone Normani, Pavel Loiko, Liza Basyrova, Gurvan Brasse, Abdelmjid Benayad, Alain Braud, Patrice Camy

Proceedings Volume 13003, Fiber Lasers and Glass Photonics: Materials through Applications IV; 130030O (2024) https://doi.org/10.1117/12.3016453
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

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 μm related to the ⁴I_11/2 → ⁴I_13/2 Er³⁺ transition. The peak stimulated-emission cross-section at the expected laser wavelength was calculated to be 0.88×10^-20 cm² at 2809 nm for π-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 ⁴I_13/2 and ⁴I_11/2 manifolds amounted to 5.54 ms and 2.66 ms, respectively.

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Citation Download Citation

Simone Normani, Pavel Loiko, Liza Basyrova, Gurvan Brasse, Abdelmjid Benayad, Alain Braud, and Patrice Camy "Spectroscopy of erbium-doped LiYF4 crystalline layers grown by liquid phase epitaxy", Proc. SPIE 13003, Fiber Lasers and Glass Photonics: Materials through Applications IV, 130030O (20 June 2024); https://doi.org/10.1117/12.3016453

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