Orange surface waveguide laser in Pr:LiYF 4 produced by femtosecond laser writing
Résumé
Depressed-cladding surface channel waveguides were inscribed in a 0.5 at.% Pr:LiYF4 crystal by femtosecond Direct Laser Writing. The waveguides consisted of a half-ring cladding (inner diameter: 17 μm) and side structures (“ears”) improving the mode confinement. The waveguide propagation loss was as low as 0.14±0.05 dB/cm. The orange waveguide laser operating in the fundamental mode delivered 274 mW at 604.3 nm with 28.4% slope efficiency, a laser threshold of only 29 mW and linear polarization (π), representing record-high performance for orange Pr waveguide lasers.
Domaines
Physique [physics]| Origine | Fichiers produits par l'(les) auteur(s) |
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