Open AccessSpectroscopic and laser properties of Er:LuSGG crystal for high-power ∼2.8 µm mid-infrared laser
Author(s) -
Xuyao Zhao,
Dunlu Sun,
Jianqiao Luo,
Huili Zhang,
Cong Quan,
Lunzhen Hu,
Zhiyuan Han,
Kunpeng Dong,
Maojie Cheng,
Shaotang Yin
Publication year - 2020
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.389550
Subject(s) - materials science , laser , optics , slope efficiency , laser diode , optoelectronics , crystal (programming language) , continuous wave , wavelength , far infrared laser , fluorescence , laser beam quality , fiber laser , absorption (acoustics) , laser power scaling , infrared , diode , laser beams , physics , computer science , composite material , programming language
We demonstrate a novel Er:LuSGG active gain medium emitting laser wavelength at 2795 nm for the first time. The Er:LuSGG crystal is grown successfully by the Czochralski method with high crystalline and optical quality. The spectra properties, including absorption and fluorescence emission cross-section are presented in contrast with similar Er-doped garnet crystals. The fluorescence lifetimes of the upper (4I11/2) and lower (4I13/2) laser levels are 1.75 and 4.64 ms, respectively. Under 973 nm laser diode pumping, a maximum output power of 789 mW in continuous-wave mode, corresponding to optical-to-optical efficiency of 20.2% and slope efficiency of 24.4%, is achieved with high laser beam quality. The results show that the Er:LuSGG is a promising MIR laser material operated at 2.8 µm.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom