Er:LiYF4 planar waveguide laser at 2.8 μm
Résumé
We report on a mid-infrared Erbium planar waveguide laser operating on the 4 I 11/2 → 4 I 13/2 transition. It employs a heavily-doped 10.6 at.% Er 3+ :LiYF 4 single-crystalline layer grown by Liquid-Phase Epitaxy (LPE). The waveguide laser delivers a maximum output power of 191 mW at ~2809 nm with a slope efficiency of 15%, a linear polarization and a laser threshold of 134 mW. The waveguide propagation losses are 0.4±0.2 dB/cm. The polarized spectroscopic properties of Er 3+ :LiYF 4 layers are also investigated. The stimulated-emission cross-section of Er 3+ ions amounts to 0.87×10 -20 cm 2 at 2809 nm for π-polarization. Er 3+ :LiYF 4 epitaxial layers represent a promising platform for integrated low-loss mid-infrared light sources.
Domaines
Physique [physics]| Origine | Fichiers produits par l'(les) auteur(s) |
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