Direct compression of 170-fs 50-cycle pulses down to 1.5 cycles with 70% transmission.

Direct compression of 170-fs 50-cycle pulses down to 1.5 cycles with 70% transmission.
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DOI:
10.1038/s41598-018-30198-y
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发表时间:
2018-08-07
期刊:
影响因子:
4.6
通讯作者:
Razzari L
Razzari L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Jeong YG;Piccoli R;Ferachou D;Cardin V;Chini M;Hädrich S;Limpert J;Morandotti R;Légaré F;Schmidt BE;Razzari L

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我们提出了一种直接用于极端脉冲压缩的方法,它依赖于适度驱动的自相位调制(SPM)在更远的传播距离上。这避免了其他有害的非线性机制接管和恶化SPM过程。利用长度可达6 m的空芯光纤实现了长距离传输。这一概念潜在地可扩展到千瓦平均功率水平下的TW脉冲峰值功率。作为概念的验证,我们展示了1 mJ,6 khz,170 飞秒Yb激光器的33倍脉冲压缩到5.1kJ(1030 nm,1.5个周期),通过使用单一的六氟化氢光纤和后续的啁啾反射镜,总透过率为70%。
We present a straightforward route for extreme pulse compression, which relies on moderately driving self-phase modulation (SPM) over an extended propagation distance. This avoids that other detrimental nonlinear mechanisms take over and deteriorate the SPM process. The long propagation is obtained by means of a hollow-core fiber (HCF), up to 6 m in length. This concept is potentially scalable to TW pulse peak powers at kW average power level. As a proof of concept, we demonstrate 33-fold pulse compression of a 1 mJ, 6 kHz, 170 fs Yb laser down to 5.1 fs (1.5 cycles at 1030 nm), by employing a single HCF and subsequent chirped mirrors with an overall transmission of 70%.
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