All-fiber narrow linewidth fiber laser achieved 3 kW near diffraction limited output at 1 030 nm
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摘要: 基于大模场面积掺镱光纤搭建了全光纤1 030 nm高功率窄线宽光纤激光主振荡功率放大系统，实现了3 004 W的最高功率输出，斜率效率69.27%，是目前报道的输出功率最高的1 030 nm波段近衍射极限光纤激光器。最高输出功率时，x，y方向的光束质量因子分别为1.169，1.174，3 dB光谱宽度为0.18 nm，放大自发辐射抑制比达到37 dB。Abstract: In this paper, we demonstrate an all-fiber high-power Yb-doped 1 030 nm fiber laser based on master oscillator power amplifier structure. The record output power at 1 030 nm up to 3 004 W was achieved, along with a slope efficiency of 69.27%, which is the highest output power for 1030 nm near diffraction limited beam quality fiber laser. The beam quality factor is Mx2＝1.169, My2＝1.174, and full width at half maximum is 0.18 nm at maximum power level. The amplified spontaneous emission (ASE) suppression ratio reaches up to 37 dB.
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图 1 （a）光纤激光器中放大级的功率输出曲线和（b）不同输出功率下的输出光谱
Figure 1. Output of fiber laser and (a) output power of amplifier stage, (b) Spectra of various output power
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