We report on a two-arm hybrid high-power laser system (HPLS) able to deliver 2 × 10 PW femtosecond pulses, developed at the Bucharest-Magurele Extreme Light Infrastructure Nuclear Physics (ELI-NP) Facility. A hybrid front-end (FE) based on a Ti:sapphire chirped pulse amplifier and a picosecond optical parametric chirped pulse amplifier based on beta barium borate (BBO) crystals, with a cross-polarized wave (XPW) filter in between, has been developed. It delivers 10 mJ laser pulses, at 10 Hz repetition rate, with more than 70 nm spectral bandwidth and high-intensity contrast, in the range of 1013:1. The high-energy Ti:sapphire amplifier stages of both arms were seeded from this common FE. The final high-energy amplifier, equipped with a 200 mm diameter Ti:sapphire crystal, has been pumped by six 100 J nanosecond frequency doubled Nd:glass lasers, at 1 pulse/min repetition rate. More than 300 J output pulse energy has been obtained by pumping with only 80% of the whole 600 J available pump energy. The compressor has a transmission efficiency of 74% and an output pulse duration of 22.7 fs was measured, thus demonstrating that the dual-arm HPLS has the capacity to generate 10 PW peak power femtosecond pulses. The reported results represent the cornerstone of the ELI-NP 2 × 10 PW femtosecond laser facility, devoted to fundamental and applied nuclear physics research.

中文翻译：

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展示 2 × 10 PW 能力的高能混合飞秒激光系统

我们报告了在 Bucharest-Magurele 极端光基础设施核物理 (ELI-NP) 设施开发的能够提供 2 × 10 PW 飞秒脉冲的双臂混合高功率激光系统 (HPLS)。一种基于钛蓝宝石啁啾脉冲放大器和基于 β 硼酸钡 (BBO) 晶体的皮秒光学参量啁啾脉冲放大器的混合前端 (FE)，其间具有交叉极化波 (XPW) 滤波器。发达。它以 10 Hz 重复频率提供 10 mJ 激光脉冲，具有超过 70 nm 的光谱带宽和高强度对比度，范围为 1013：1。两个臂的高能钛：蓝宝石放大器级都是从这个共同的 FE 中播种的。最终的高能放大器配备了一个 200 毫米直径的钛：蓝宝石晶体，由六个 100 J 纳秒倍频 Nd：玻璃激光器以 1 脉冲/分钟的重复频率泵浦。仅用全部 600 J 可用泵浦能量的 80% 即可通过泵浦获得超过 300 J 的输出脉冲能量。该压缩机的传输效率为 74%，测得的输出脉冲持续时间为 22.7 fs，从而证明双臂 HPLS 具有产生 10 PW 峰值功率飞秒脉冲的能力。报告的结果代表了 ELI-NP 2 × 10 PW 飞秒激光设施的基石，致力于基础和应用核物理研究。