Open AccessMitigation of mode instability in laser oscillators based on deuterium loading
Author(s) -
Yisha Chen,
HengYu Xu,
Yingbin Xing,
Gui Chen,
Ruiting Cao,
Lei Liao,
Yibo Wang,
Haiqing Li,
Jinggang Peng,
Lüyun Yang,
Nengli Dai,
Jinyan Li
Publication year - 2019
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.27.025964
Subject(s) - instability , fiber laser , deuterium , laser , optics , materials science , ytterbium , laser power scaling , scaling , atomic physics , physics , mechanics , geometry , mathematics
Ytterbium-doped fiber (YDF) loaded with deuterium is used herein to mitigate mode instability. Experimental results reveal that this method can increase the mode instability threshold in a laser oscillator. Specifically, when the YDF was loaded with deuterium over two- and four-week periods, the mode instability threshold power increased from ∼459 W to ∼533 W (16%) and to ∼622 W (35%), respectively, but the respective laser efficiencies were almost unaffected (71.5% vs. 72.9% and 75.4%). In conclusion, deuterium loading is effective in the mitigation of mode instability. It is envisaged to be applied in the power scaling of high-power fiber lasers.