Open AccessContinuous-wave laser generation at ~21 µm in Ho:KRE(WO_4)_2 (RE = Y, Gd, Lu) crystals: a comparative study
Author(s) -
Venkatesan Jambunathan,
Xavier Mateos,
María Cinta Pujol,
Joan J. Carvajal,
Francesc Dı́az,
Magdalena Aguiló,
Uwe Griebner,
Valentín Petrov
Publication year - 2011
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.19.025279
Subject(s) - laser , monoclinic crystal system , materials science , optics , slope efficiency , diode , continuous wave , laser diode , laser pumping , optoelectronics , fiber laser , physics , chemistry , crystallography , crystal structure
The laser performance of the monoclinic Ho:RE(WO4)2 (RE = Y, Gd, Lu) crystals is compared under identical experimental conditions. The comparison deals with the laser transition of Ho3+ at ~2.1µm by using two different pump sources, a diode laser operating at 1941 nm and a diode-pumped Tm:KLu(WO4)2 laser operating at 1946 nm. The results show internal slope efficiencies of ~60% and output powers exceeding 400 mW. The laser performance of Ho:KY(WO4)2 and Ho:KLu(WO4)2 is quite similar and superior to Ho:KGd(WO4)2.