飞秒激光直写FBG用于谐振腔输出功率突破千瓦

赵蓉; 高晨晖; 路欣达; 饶斌裕; 田鑫; 李昊; 王蒙; 李智贤; 杨保来; 陈子伦; 马鹏飞; 王泽锋

doi:10.11884/HPLPB202537.250091

飞秒激光直写FBG用于谐振腔输出功率突破千瓦

doi: 10.11884/HPLPB202537.250091

赵蓉^{1, 2,},
高晨晖^{1, 2},
路欣达^{1, 2},
饶斌裕^{1, 2},
田鑫^{1, 2},
李昊^{1, 2},
王蒙^{1, 2},
李智贤^{1, 2},
杨保来^{1, 2},
陈子伦^{1, 2},
马鹏飞^{1, 2},
王泽锋^{1, 2, ,}

1.
国防科技大学前沿交叉学科学院，长沙 410073
2.
国防科技大学南湖之光实验室，长沙 410073

基金项目: 国家自然科学基金项目（62405373）; 湖南省科技创新领军人才（2021RC4027）

详细信息

作者简介:
赵　蓉，zhaorong_chn@163.com

通讯作者:
王泽锋，zefengwang_nudt@163.com。

中图分类号: TN242
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- 文章访问数: 13
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- 被引次数: 0
出版历程
- 收稿日期: 2025-04-22
- 修回日期: 2025-05-01
- 录用日期: 2025-05-01
- 网络出版日期: 2025-04-27
- 刊出日期: 2025-03-31

Femtosecond laser direct-writing FBGs achieve kilowatt-level output power in all-fiber oscillator

Zhao Rong^{1, 2
,},
Gao Chenhui^{1, 2},
Lu Xinda^{1, 2},
Rao Binyu^{1, 2},
Tian Xin^{1, 2},
Li Hao^{1, 2},
Wang Meng^{1, 2},
Li Zhixian^{1, 2},
Yang Baolai^{1, 2},
Chen Zilun^{1, 2},
Ma Pengfei^{1, 2},
Wang Zefeng^{1, 2
, ,}

1.
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
2.
Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China

摘要

摘要:
运用飞秒激光逐面直写技术，结合光束整形方法，成功实现了一步直写大面积光栅栅面。基于该方法在20/400 μm双包层光纤中成功制备高低反光栅对，并用于搭建全光纤振荡器。在
2262
W泵浦功率下实现
1664
W近单模激光输出，光-光转换效率达73.47%，光束质量因子M²=1.46，输出光谱3-dB带宽为3 nm且无受激拉曼散射峰。研究结果表明，飞秒激光直写技术在高功率光栅制备中同时具备工艺灵活性与热管理优势，为全光纤激光器性能提升提供关键技术路径。
- 飞秒激光直写技术 /
- 光纤光栅 /
- 全光纤振荡器
Abstract:
We have developed a femtosecond laser plane-by-plane direct writing method based on beam shaping, enabling single-step fabrication of the large-area fiber Bragg grating (FBG) planes. Using this innovative approach, we successfully fabricated high-reflectivity (HR) and low-reflectivity (LR) FBG pairs in 20/400-m double-clad fibers and implemented them in an all-fiber oscillator. Under a pump power of
2262
W, the oscillator achieved near-single-mode laser output of
1664
W with an optical–optical conversion efficiency of 73.47%, a beam quality factor M² of 1.46, and a 3-dB spectral bandwidth of 3 nm without stimulated Raman scattering peaks. The results indicate that femtosecond laser direct writing technology offers both fabrication flexibility and thermal management advantages for high-power grating fabrication, and establishes a key technological pathway for enhancing the performance of all-fiber laser systems.
- femtosecond laser direct writing technology /
- fiber Bragg grating /
- all-fiber oscillator