Abstract
Trigonal langasite-type ordered silicate crystal (Yb:CNGS) is a promising material for efficient lasers. We report on the first passively -switched Yb:CNGS laser using and saturable absorbers (SAs) with a 976 nm volume-Bragg-grating-stabilized diode as a pump source. The laser crystal was a cut 3 at.% Yb:CNGS grown by the Czochralski method. It was placed in a compact microchip-type laser cavity. With a SA, very stable 62.2 μJ/4.4 ns pulses were achieved at a repetition rate of 22.5 kHz. The average output power was 1.40 W at 1015.3 nm, corresponding to a switching conversion efficiency of 90%. With the SA, the pulse characteristics were 13.3 μJ/11.1 ns at a higher repetition rate of 68.4 kHz. The performance of the was numerically modeled showing a good agreement with the experiment.
© 2018 Optical Society of America
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