Open AccessCurved Yb:YAG waveguide lasers, fabricated by femtosecond laser inscription
Author(s) -
Thomas Calmano,
Anna-Greta Paschke,
Sebastian Müller,
Christian Kränkel,
G. Huber
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.025501
Subject(s) - laser , optics , materials science , femtosecond , waveguide , sapphire , ti:sapphire laser , refractive index , curvature , optoelectronics , slope efficiency , fiber laser , physics , geometry , mathematics
Straight and s-curve Yb(7%):YAG waveguides have been fabricated with the femtosecond laser writing technique. By employing a novel writing scheme an increase of the refractive index change could be achieved in comparison to waveguides written with the standard procedure. Straight waveguides, fabricated with this scheme, enabled highly efficient Ti:sapphire laser pumped waveguide lasers with slope efficiencies of 79% and output powers of more than 1 W. With slope efficiencies from 50% to 60% for the curved waveguide lasers with radii of curvature of R ≥ 20 mm the possibility of fs-laser written complex optical devices is demonstrated.