Open AccessSpectroscopic analysis and efficient diode-pumped 19 μm Tm^3+-doped β′-Gd_2(MoO_4)_3 crystal laser
Author(s) -
Jianfeng Tang,
Yujin Chen,
Yanfu Lin,
Xinghong Gong,
Jianhua Huang,
Zhixun Luo,
Yidong Huang
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.19.013185
Subject(s) - materials science , laser , optics , slope efficiency , output coupler , crystal (programming language) , diode , doping , laser diode , optoelectronics , active laser medium , fiber laser , laser power scaling , physics , computer science , programming language
Tm3+-doped β'-Gd2(MoO4)3 single crystal was grown by the Czochralski method. Spectroscopic analysis was carried out along different polarizations. End-pumped by a quasi-cw diode laser at 795 nm in a plano-concave cavity, an average laser output power of 58 mW around 1.9 μm was achieved in a 0.93-mm-thick crystal when the output coupler transmission was 7.1%. The absorbed pump threshold was 8 mW and the slope efficiency of the laser was 57%. This crystal has smooth and broad gain curve around 1.9 μm, which shows that it is also a potential gain medium for tunable and short pulse lasers.