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首页> 外文期刊>Optics Letters >High-energy, kHz-repetition-rate, ps cryogenic Yb:YAG chirped-pulse amplifier
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High-energy, kHz-repetition-rate, ps cryogenic Yb:YAG chirped-pulse amplifier

机译：高能，kHz重复频率，ps低温Yb：YAG chi脉冲放大器

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摘要

We demonstrate amplification of picosecond laser pulses to 40 mJ at a 2 kHz pulse repetition frequency (PRF) from a two-stage cryogenic chirped-pulse Yb:YAG amplifier, composed of a regenerative amplifier (RGA) and a two-pass booster amplifier. The RGA produces 8.2 mJ of energy at 2 kHz PRF and 13.2 mJ at 1 kHz PRF with excellent energy stability (approx0.3percent rms) and beam quality (M~(2) < 1.1). Pulse stretching and compression are achieved by using a chirped fiber Bragg grating and a multilayer dielectric grating pair, respectively. Compressed 15ps pulses from the RGA are obtained with a throughput efficiency of approx80percent (approx6.5 mJ for 2 kHz). The booster amplifier further amplifies the pulses to 40 mJ at 2 kHz PRF, and approx32 mJ, approx15 ps pulses are expected after compression. The amplifier chain seeded from a femtosecond Yb-fiber laser enables the optical self-synchronization between signal and pump in optical parametric chirped-pulse amplifier applications.
机译：我们演示了由两级低温chi脉冲Yb：YAG放大器以2 kHz脉冲重复频率（PRF）将皮秒激光脉冲放大到40 mJ的过程，该放大器由再生放大器（RGA）和两通升压放大器组成。 RGA在2 kHz PRF时产生8.2 mJ的能量，在1 kHz PRF时产生13.2 mJ的能量，具有出色的能量稳定性（均方根值的0.3％）和光束质量（M〜（2）<1.1）。脉冲拉伸和压缩分别通过使用fiber光纤布拉格光栅对和多层介质光栅对实现。从RGA获得的压缩15ps脉冲的吞吐效率约为80％（2 kHz约为6.5 mJ）。升压放大器在2 kHz PRF时进一步将脉冲放大到40 mJ，压缩后预计约32 mJ，约15 ps脉冲。飞秒Yb光纤激光器植入的放大器链可在光参量chi脉冲放大器应用中实现信号和泵浦之间的光学自同步。

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