Harmonic generation inside a non-collinear optical parametric oscillator

非共线光参量振荡器内部的谐波产生

• 批准号: 450606493
• 负责人: Professor Dr. Uwe Morgner
• 金额: --
• 依托单位: Institut für Quantenoptik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/450606493?language=en
• 关键词: Harmonic; generation; inside; non; collinear

In the preliminary work, the non-collinear phase-matched parametric oscillator (NOPO) was investigated in many ways. Among other things, a dispersion-managed NOPO (DMNOPO) concept was presented, which opens up a new approach to power scaling of pulses of a duration of a few optical cycles from an oscillator. The DM-NOPO can be easily scaled via the pump laser and is ultimately only limited by component damage. In the present application the further power scaling by a new thin-disk laser oscillator as a pump laser shall be pursued. The pulses circulating in the DMNOPO are focused into a gas jet at a point in the resonator where they have the few-cycle duration. There, strong-field effects at oscillator repetition rates can and shall be studied. A novel double pulse topology enables the non-collinear generation of radiation in noble gases and their efficient extraction. The aim is to study the generation of harmonic radiation, initially of a lower order and later of a higher order. Of particular interest is the irradiation of laser pulses with elliptical polarization into the target. The preliminary work has shown that interesting information about the ionization dynamics in the sense of an optical attoclock can be extracted from the resulting polarization state of the harmonics. This work paves the way for the generation of high order harmonics and the demonstration of a real mode comb in the XUV spectral range with resonantly enhanced few-cycle pulses.

在初步工作中，对非共线相匹配的参数振荡器（NOPO）进行了多种方式研究。除其他外，还提出了通过分散性管理的NOPO（DMNOPO）概念，从而为振荡器的持续时间脉冲的脉冲脉冲量扩展开辟了新的方法。 DM-NOPO可以轻松地通过泵激光缩放，最终仅受到组件损坏的限制。在本应用中，应追捕新的薄磁盘激光振荡器作为泵激光器的进一步缩放。 DMNOPO中循环的脉冲聚焦在谐振器中的一个循环持续时间的一个点上。在那里，可以并且应研究振荡器重复率的强场效应。一种新型的双重脉冲拓扑可以使贵重气体中的非共线产生辐射及其有效提取。目的是研究谐波辐射的产生，最初是较低阶的和更高阶的后期。特别令人感兴趣的是将激光脉冲辐射到目标中。初步工作表明，可以从光学上的静电词的意义上提取有关电离动力学的有趣信息，可以从谐波的产生极化状态中提取。这项工作为产生高阶谐波的生成铺平了道路，并在XUV光谱范围内的真实模式梳子进行了演示，并具有共鸣的几个周期脉冲。