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arXiv 1609.04555physics.optics
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由皮秒Ho:YAG啁啾脉冲放大器驱动的亚100飞秒、5.2 μm ZGP参量放大器及其在高次谐波产生中的应用

Sub 100-fs, 5.2-$μ$m ZGP Parametric Amplifier Driven by a ps Ho:YAG Chirped Pulse Amplifier and its application to high harmonic generation

Vienna University of Technology(维也纳工业大学);The University of Tokyo(东京大学);Menlo Systems GmbH(Menlo Systems有限公司);University of Erlangen-Nuremberg(埃尔朗根-纽伦堡大学);Center for Physical Sciences & Technology(物理科学和技术中心)

Tsuneto Kanai, Pavel Malevich, Sarayoo Sasidharan Kangaparambil, Heinar Hoogland, Ronald Holzwarth, Audrius Pugžlys, Andrius Baltuška

AI总结:

本研究研制出中心波长5.2 μm、脉宽99飞秒的kHz重复频率中红外光参量放大器系统,开发了新型脉冲压缩方案,并首次将其用于块状ZnSe中的高次谐波等超快现象研究,揭示导带结构。

摘要:

我们报道了一种重复频率为1 kHz的中红外(MIR)光参量放大器(OPA)系统,其中心工作波长为5.2 μm,尾对尾光谱覆盖范围超过1.5 μm,可输出40 μJ的脉冲,脉冲被压缩至99飞秒(5.6个光学周期)。此外,我们还开发了一种新型脉冲压缩方案,用于进一步压缩脉冲并实现波长可调谐。作为该激光系统的首次应用,我们在块状ZnSe中产生了带隙以上的高次谐波、10光子吸收后的密集激子产生、高阶和频与差频产生、导带中的超快跃迁,这些现象反映了导带的结构。

英文摘要:

We report a 1 kHz repetition-rate mid-IR (MIR) optical parametric amplifier (OPA) system operating at a central wavelength of 5.2 $μ$m with the tail-to-tail spectrum extending over 1.5 $μ$m and delivering 40 $μ$J pulses that are compressed to 99 fs (5.6 optical cycles). Also we develop a novel pulse compression scheme for further pulse compression and wavelength tunability. As the first application of this laser system, we generated high harmonics in bulk ZnSe above the bandgap, dense exciton generation after 10-photon absorption, high order sum- and difference-frequency generation, ultrafast transition in the conduction band, which reflects the structure of conduction bands.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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