High power mode comb from a non-collinear optic parametric oscillator

非共线光学参量振荡器的高功率模式梳

• 批准号: 206327953
• 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
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/206327953?language=en
• 关键词: power; mode; comb; non; collinear

For decades optic parametric oscillators (OPOs) are well known for producing femtosecond pulses with narrow bandwidth, acceptable average output powers, and wide tunability. In this project, we will explore novel concepts to access the few‐cycle pulse duration regime for the first time. Non‐collinear pumping geometry allows for ultra broadband gain bandwidth (we then call it NOPO). Adding a Kerr‐based fast saturable absorber in a second focus in combination with double‐chirped mirror based broadband dispersion management gives rise to the first few‐cycle pulses from an OPO. The main challenge will be the control of the intracavity pulse shaping dynamics to keep the ultrabroad spectrum in a long pulse for maximum gain extraction; our approach is based on ideas well elaborated in the context of fiber oscillators. In contrast to comparable laser oscillators, here the output power is only limited by the power of the pump laser due to the absence of thermal lensing effects. By pumping with a home‐built thin‐disk based femtosecond high power laser, we will approach the multi‐Watt level of average output power. The stable pulse train from the NOPO forms a broadband mode comb, which will be subject of in‐depth investigations regarding its coherence properties and timing jitter respectively. This very new concept for high power mode combs allows for efficient frequency conversion into remote wavelength regions, especially the near UV.

数十年来，光学参数振荡器（OPOS）以产生狭窄带宽，可接受的平均输出功率和宽的可密斥性而闻名。在这个项目中，我们将探索新颖的概念，以首次访问几循环持续时间。非连线泵送几何形状允许超宽带增益带宽（然后我们称其为NOPO）。在第二个焦点中添加基于KERR的快速饱和吸收剂与双层镜面宽带分散管理结合在一起，从而增加了OPO的前几个周期脉冲。主要的挑战将是控制腔内脉冲塑造动力学，以使超子频谱保持长脉冲，以最大程度地提取增益；我们的方法基于在纤维振荡器的背景下详细阐述的思想。与可比的激光振荡器相反，此处的输出功率仅受泵激光器的功率限制，因为没有热透镜效应。通过用自制的基于薄盘的飞秒高功率激光泵送，我们将接近平均输出功率的多瓦水平。 NOPO的稳定脉冲序列形成了宽带模式梳子，该宽带模式梳子将分别进行有关其相干性能和正时抖动的深入研究。高功率模式梳子的这个非常新的概念使得有效地转换为远程波长区域，尤其是近紫外线。