In this letter, we report the demonstration of terawatt (TW)-scale femtosecond vortex laser pulses based on noncollinear optical parametric chirped-pulse amplification (OPCPA) centered at 800 nm. To the best of our knowledge, this is the first experimental study of amplification for OPCPA-based vortex pulses to achieve a powerful ultrafast (TW-scale) vortex pulse output. In this experiment, a 0.5-mJ broadband chirped vortex pulse was amplified to 47 mJ with a 15-mm-long LiB3O5 crystal. The double-pass grating pair compressor with an efficiency of 65% maintained the beam vortex, and a pulse of width 30.1 fs was obtained, corresponding to a peak power of 1.02 TW. This laser can be used in studies on nonlinear optics and relativistic laser-plasma interactions, compact plasma-based accelerators, and light sources.

中文翻译：

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基于光学参量啁啾脉冲放大产生太瓦级涡旋脉冲

在这封信中，我们报告了基于以 800 nm 为中心的非共线光学参量啁啾脉冲放大 (OPCPA) 的太瓦 (TW) 级飞秒涡旋激光脉冲的演示。据我们所知，这是第一次对基于 OPCPA 的涡流脉冲进行放大以实现强大的超快（TW 级）涡流脉冲输出的实验研究。在这个实验中，一个 0.5-mJ 的宽带啁啾涡旋脉冲被一个 15-mm 长的 LiB3O5 晶体放大到 47mJ。效率为 65% 的双通光栅对压缩器保持光束涡流，获得宽度为 30.1 fs 的脉冲，对应的峰值功率为 1.02 TW。这种激光器可用于非线性光学和相对论激光-等离子体相互作用、紧凑型等离子体加速器和光源的研究。