This article is cited in 1 paper

Lasers

Experimental study of a VBG-based Tm:YLF slab laser at different output coupler parameters

X. M. Duan, Y. Ding, T. Y. Dai, K. Zhao, B. Q. Yao

Harbin Institute of Technology

Abstract: The performance of a Tm:YLF slab laser is studied at different output coupler parameters. Use is made of a 20-mm-long a-cut slab crystal doped with 2.5 at.% thulium ions. With a volume Bragg grating and a Fabry–Perot etalon, the selected output wavelength of this Tm:YLF slab laser is 1908 nm. For the optimised output coupler with a transmission of 20% and a radius of curvature of 300 mm, the output power exceeds 74.1 W and the slope efficiency with respect to the absorbed pump power reaches 48.4%. In addition, the beam quality of the Tm:YLF slab laser is improved.

Keywords: solid-state laser, diode pumping, Tm:YLF, volume Bragg grating.

PACS: 42.55.Rz, 42.60.Da, 42.60.Lh, 42.79.Dj

Received: 17.04.2014
Revised: 29.05.2014

 English version: Quantum Electronics, 2015, 45:4, 312–314

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