Ho:KY(WO4)2thin-disk laser passively Qswitched by a GaSb-based SESAM

Identifier:  imarina:3823884

Handle: https://hdl.handle.net/20.500.11797/imarina3823884

Authors:  Mateos, X; Loiko, P; Lamrini, S; Scholle, K; Fuhrberg, P; Suomalainen, S; Härkönen, A; Guina, M; Vatnik, S; Vedin, I; Aguiló, M; Díaz, F; Wang, YC; Griebner, U; Petrov, V

Abstract:
© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. A Holmium thin-disk laser based on a 3 at.% Ho:KY(WO 4 ) 2 /KY(WO4)2 epitaxy and single-bounce pumping by a 1960 nm Tm-fiber laser is passively Q-switched with a GaSb-based quantum-well semiconductor saturable absorber mirror. It generates an average output power of 551 mW at 2056 nm with a slope efficiency of 44% (with respect to the absorbed pump power). The best pulse characteristics (energy and duration) are 4.1 ?J /201 ns at a repetition rate of 135 kHz and the conversion efficiency with respect to the continuous-wave regime is as high as 93%.