Continuous-wave and passively Q-switched cryogenic Yb:KLu(WO4)2 laser

Identifier:  PC:3250

Handle: https://hdl.handle.net/20.500.11797/PC3250

Authors:  Mateos, X.; Navratil, P.; Jambunathan, V.; David, S. P.; Yue, F.; Serres, J. M.; Aguiló, M.; Díaz, F.

Abstract:
We study cryogenic laser operation of an Yb-doped KLu(WO4)2 crystal pumped with a volume Bragg grating (VBG) stabilized diode laser at 981 nm. In the continuous wave laser regime, a maximum output power of 4.31 W is achieved at 80 K with a slope efficiency of 44.0% with respect to the incident pump power. Using a 85% initial transmission Cr:YAG crystal for passive Q-switching, an average output power of 2.11 W is achieved at 100 K for a repetition rate of 19 kHz. The pulse energy, pulse duration and peak power amount to 111 ¿J, 231 ns and 0.48 kW, respectively.