Frontiers in Physics (Jun 2023)
Mitigating mode instabilities by controllable mode beating excitation with a photonic lantern
- Yao Lu,
- Zongfu Jiang,
- Zongfu Jiang,
- Zongfu Jiang,
- Hu Xiao,
- Hu Xiao,
- Hu Xiao,
- Zilun Chen,
- Zilun Chen,
- Zilun Chen,
- Man Jiang,
- Man Jiang,
- Man Jiang,
- Junyu Chai,
- Hao Yang,
- Lianchuang Ding,
- Dan Zhang,
- Dan Zhang,
- Dan Zhang,
- Jiangbin Zhang,
- Jiangbin Zhang,
- Jiangbin Zhang,
- Qiong Zhou,
- Qiong Zhou,
- Qiong Zhou,
- Wenguang Liu,
- Wenguang Liu,
- Wenguang Liu
Affiliations
- Yao Lu
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Zongfu Jiang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Zongfu Jiang
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
- Zongfu Jiang
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
- Hu Xiao
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Hu Xiao
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
- Hu Xiao
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
- Zilun Chen
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Zilun Chen
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
- Zilun Chen
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
- Man Jiang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Man Jiang
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
- Man Jiang
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
- Junyu Chai
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Hao Yang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Lianchuang Ding
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Dan Zhang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Dan Zhang
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
- Dan Zhang
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
- Jiangbin Zhang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Jiangbin Zhang
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
- Jiangbin Zhang
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
- Qiong Zhou
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Qiong Zhou
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
- Qiong Zhou
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
- Wenguang Liu
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Wenguang Liu
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
- Wenguang Liu
- Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
- DOI
- https://doi.org/10.3389/fphy.2023.1198092
- Journal volume & issue
-
Vol. 11
Abstract
In this study, a method of stabilizing the output beam of a large-mode-area fiber amplifier operating above the mode instability threshold is demonstrated. A mode control system based on the photonic lantern is used to excite dynamic mode beatings as the seeding stage of a 42/250 µm Yb-doped fiber amplifier. We propose a theoretical explanation for the validity of this method: provided that the mode interference patterns generated by input mode beatings are antisymmetric to those in the main amplifier caused by thermally induced non-linear effects, the refractive index grating will not be formed to indicate the onset of mode instability. Experimentally, significant mode stability and beam quality improvement have been achieved in this system at power levels of up to nearly four times the mode instabilities threshold.
Keywords
