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首页> 外文期刊>Optics Letters >High-power mid-infrared picosecond pulse bunch generation through difference frequency generation
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High-power mid-infrared picosecond pulse bunch generation through difference frequency generation

机译：高功率中红外线皮秒脉冲束呈差异频率生成

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摘要

We report a high average power mid-infrared picosecond (ps) pulse bunch output by means of direct difference frequency generation (DFG) in periodically poled magnesium-doped lithium niobate between a linearly polarized ps pulse bunch Yb fiber laser and a synchronized. Er fiber laser. The ps pulse bunch Yb fiber laser was composed of an all polarization maintained "figure of eight" structured mode-locked Yb fiber laser as the seed, a pulse multiplier, and two stages of Yb fiber amplifiers. The modelocked Yb fiber laser has an output ps laser pulse at 1030 nm with a repetition rate of 16.32 MHz. The pulses were then transformed to the pulse bunches through the pulse multiplier. Within each bunch, there were 16 equally spaced pulses with pulse widths of 8.5 ps and time intervals around 300 ps. The Er fiber laser hada gain switched seed laser diode working at 1550 nm with a pulse width around 5.1 ns, which was synchronized to the mode-locked Yb fiber laser pulse bunch, and two stages of Er fiber amplifiers. Under the average power of 27.8 W of Yb fiber laser, we obtained an average output power of 3.1 W at 3.07 mu M. This is, to the best of our knowledge, the highest average power mid-infrared ps pulse bunch obtained via DFG directly. (C) 2020 Optical Society of America
机译：我们通过在线性极化PS脉冲束YB光纤激光器和同步，通过在周期性抛光的镁掺杂锂铌酸盐中报告高平均电力中红外皮秒（PS）脉冲束输出的直接差异频率产生（DFG）输出。 ER光纤激光器。 PS脉冲束YB光纤激光器由A的全部偏振构成为“八个”结构化模式锁定的YB光纤激光器，作为种子，脉冲倍增器和YB光纤放大器的两个阶段。模型yb光纤激光器在1030nm处具有输出PS激光脉冲，重复率为16.32MHz。然后通过脉冲倍增器将脉冲转换为脉冲束。在每个束内，有16个等间隔的脉冲，脉冲宽度为8.5 ps，时间间隔约为300 ps。 ER光纤激光HADA增益切换种子激光二极管在1550nm下工作，脉冲宽度约为5.1ns，其与模式锁定的Yb光纤激光脉冲束同步，并且是ER光纤放大器的两个阶段。在27.8W的YB光纤激光器的平均功率下，我们在3.07亩的平均输出功率为3.1W。这是我们所知的最高平均电源中红外线PS脉冲脉冲直接获得。 （c）2020美国光学学会

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