百千瓦级高峰值功率Tm:YLF激光器

1)深圳大学电子与信息工程学院,广东深圳 518060; 2)深圳市激光工程重点实验室,先进光学精密制造技术广东普通高校重点实验室,深圳大学物理与光电工程学院,广东深圳 518060

光电子与激光技术; 固体激光器; 声光调Q; Tm:YLF晶体; 大功率激光器; 中红外激光器

Hundred-kilowatt-level high peak power Tm:YLF laser
REN Xikui1, 2, PEI Jihong1, and RUAN Shuangchen2

1)College of Electronics and Information Technology, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China2)Shenzhen Key Laboratory of Laser Engineering, Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China

optoelectronics and laser technology; solid laser; acoustic-optics Q-switched; Tm:YLF crystal; high power laser; mid-infrared laser

DOI: 10.3724/SP.J.1249.2020.04403

备注

为研制一款具有高峰值功率与高光束质量的2 μm波段固体激光器,搭建二极管激光器(laser diode, LD)单端抽运声光调Q Tm:YLF激光器.激光器的输出中心波长为1 879 nm,采用声光调Q技术,得到重复频率为2 kHz的脉冲激光输出,峰值功率达到100.2 kW,最大单脉冲能量为5.25 mJ,最短脉冲宽度为52.2 ns,光-光转换率为30%,斜率效率为33%.光束M2因子分别为x方向1.51和y方向1.71,光束质量良好.该激光器同时具有高峰值功率与优良光束质量的特点,可广泛用于透明塑料的精细加工、激光医疗以及工业打标等领域.

In order to develop a 2 μm band solid state laser with high peak power and high beam quality, we construct a laser diode single-end pumped Q-switch Tm:YLF laser, the central wavelength of which is 1 879 nm and actively Q-switched using an acoustic-optics modulator working at a repetition frequency of 2 kHz. The output peak power up to 100.2 kW is achieved with the single pulse energy of 5.25 mJ, the shortest pulse width of 52.2 ns, corresponding to a slope efficiency of 33% and an optical conversion efficiency of 30%. The output beam shows the good beam quality of M2x=1.51 and M2y=1.71. The laser has high peak power and excellent beam quality, which can be widely used in the fine processing of transparent plastics, laser medical treatment, industrial laser marking and other fields.

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