High-energy, kHz-repetition-rate, ps cryogenic Yb:YAG chirped-pulse amplifier.
High-energy, kHz-repetition-rate, ps cryogenic Yb:YAG chirped-pulse amplifier.
复制标题
高能、kHz 重复率、ps 低温 Yb:YAG 啁啾脉冲放大器。
作者：
K. Hong;J. Gopinath;D. Rand;A. Siddiqui;Shu;E. Li;B. Eggleton;J. Hybl;T. Fan;F. Kärtner
我们证明放大皮秒激光脉冲到40？mJ为2？由再生放大器（RGA）和双通升压放大器组成的两级低温啁啾脉冲Yb：YAG放大器的kHz脉冲重复频率（PRF）。RGA在2kHz PRF下产生8.2mJ的能量，在1kHz PRF下产生13.2mJ的能量，具有优异的能量稳定性（约0.3% rms）和光束质量（M（2）<1.1）。利用啁啾光纤光栅和多层介质光栅对分别实现了脉冲的展宽和压缩。压缩15？从RGA获得的ps脉冲的吞吐效率约为80%（2kHz约为6.5mJ）。升压放大器在2kHz PRF下进一步将脉冲放大到40mJ，并且在压缩后预期约32mJ、约15ps的脉冲。在光参量啁啾脉冲放大器中，由飞秒Yb光纤激光器产生的放大链实现了信号和泵浦光之间的光自同步。
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 8.2mJ of energy at 2kHz PRF and 13.2mJ at 1kHz PRF with excellent energy stability (approximately 0.3% 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 15?ps pulses from the RGA are obtained with a throughput efficiency of approximately 80% (approximately 6.5 mJ for 2kHz). The booster amplifier further amplifies the pulses to 40mJ at 2kHz PRF, and approximately 32 mJ, approximately 15 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.