−50～50 ℃超宽温运行光纤激光器实现2 kW功率输出

基金项目: 长沙市杰出创新青年培养计划(kq2406002)；国防科技大学自主创新科学基金（25-ZZCX-XXXJS-3）；国防科技大学自主科研项目（202301-XXGC-XX-045）

2 kW fiber laser with wide temperature operation from −50 to 50 ℃

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
3.
Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha 410073, China

摘要: 提高光纤激光器的宽温运行能力，可有效提升光纤激光器在极端高低温条件下的环境适应能力与运行可靠性，确保其在复杂工况下的稳定输出，为相关领域的技术革新与产业升级提供支撑。近期，国防科技大学利用光纤耦合半导体激光器直接泵浦实现了可在−50～50 ℃内稳定运行的近单模全光纤激光振荡器，输出功率达到2 kW，是目前公开报道的宽温度范围运行光纤激光器最高输出功率水平。
- 光纤激光器 /
- 光纤激光振荡器 /
- 宽温运行
Abstract: Improving the wide-temperature operation ability of fiber lasers can effectively enhance the environmental adaptability and operation reliability of fiber lasers under extreme high- and low-temperature conditions. This ensure their stable output under complex working conditions, and provides support for technological innovation and industrial upgrading in related fields. Recently, the National University of Defense Technology achieved a near-single-mode all-fiber laser oscillator that can operate stably within the temperature range of −50 to 50 ℃ by directly pumping with fiber-coupled semiconductor lasers. The output power reached 2 kW, which is the highest output power level of fiber lasers operating in such a wide temperature range reported publicly so far.
- Fiber laser /
- optical fiber oscillator /
- wide temperature operation.

图 1 −50～50 ℃宽温运行2 kW光纤激光器光路结构图

Figure 1. Schematic diagram of 2 kW fiber laser with wide temperature operation from −50 to 50 ℃

下载: 全尺寸图片幻灯片

图 2 宽温运行光纤激光振荡器试验结果

Figure 2. Experimental results of the fiber laser oscillator with wide-temperature operation

下载: 全尺寸图片幻灯片

[1]	高琼. 工作温度对光纤激光器输出特性影响的理论与实验研究[D]. 长沙: 国防科技大学, 2019 Gao Qiong. Theoretical and experimental research on fiber laser performance working at different temperatures[D]. Changsha: National University of Defense Technology, 2019
[2]	吴金明. 低温对大功率光纤激光器输出特性影响的理论与实验研究[D]. 长沙: 国防科技大学, 2021 Wu Jinming. Theoretical and experimental research on high power fiber laser performance working at low temperature[D]. Changsha: National University of Defense Technology, 2019
[3]	李凤昌, 王鹏, 王小林, 等. −50~50 ℃超宽温运行千瓦级光纤激光器[J]. 强激光与粒子束, 2023, 35:091013 doi: 10.11884/HPLPB202335.230220 Li Fengchang, Wang Peng, Wang Xiaolin, et al. −50~50 ℃ ultra-wide temperature operation kilowatt-class fiber laser[J]. High Power Laser and Particle Beams, 2023, 35: 091013 doi: 10.11884/HPLPB202335.230220
[4]	Yan Baolaig, Wan Peng g, Zhang Hanwei , et al. 6 kW single mode monolithic fiber laser enabled by effective mitigation of the transverse mode instability[J]. Optics Express, 2021, 29(17): 26366-26374.