Open AccessContinuous-wave and passively Q-switched cryogenic Yb:KLu(WO_4)_2 laser
Author(s) -
Petr Navrátil,
Venkatesan Jambunathan,
Samuel Paul David,
Fangxin Yue,
Josep María Serres,
Xavier Mateos,
Magdalena Aguiló,
Francesc Díaz,
Uwe Griebner,
Valentín Petrov,
Antonio Lucianetti,
Tomáš Mocek
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.025886
Subject(s) - materials science , optics , laser , slope efficiency , q switching , pulse duration , crystal (programming language) , continuous wave , diode , pulse width modulation , power (physics) , optoelectronics , fiber laser , physics , quantum mechanics , computer science , programming language
We study cryogenic laser operation of an Yb-doped KLu(WO 4 ) 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 µJ, 231 ns and 0.48 kW, respectively.