title: Thulium channel waveguide laser with 1.6 W of output power and ∼80% slope efficiency.
abstract: Laser experiments were performed on buried, ridge-type channel waveguides in 8 at.% thulium-doped, yttrium-gadolinium-lutetium co-doped potassium double tungstate. By pumping with a Ti:sapphire laser at 794 nm, 1.6 W of output power at 1.84 μm with a maximum slope efficiency of ∼80% was obtained in a laser resonator with a high output-coupling degree of 89%. To the best of our knowledge, this result represents the most efficient 2-μm channel waveguide laser to date.
authors: K
authors: K
authors: van Dalfsen
authors: S
authors: S
authors: Aravazhi
authors: C
authors: C
authors: Grivas
authors: S M
authors: SM
authors: García-Blanco
authors: M
authors: M
authors: Pollnau