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.

几十年来，光学参量振荡器（OPO）以产生窄带宽、可接受的平均输出功率和宽调谐度的飞秒脉冲而闻名。在这个项目中，我们将探索新的概念，以首次访问几个周期的脉冲持续时间制度。非共线泵浦几何结构允许超宽带增益带宽（我们称之为NOPO）。在第二焦点中添加基于克尔的快速可饱和吸收体与基于双啁啾镜的宽带色散管理相结合，产生来自OPO的前几个周期脉冲。主要的挑战将是控制腔内脉冲整形动力学，以保持超宽光谱的长脉冲最大增益提取;我们的方法是基于在光纤振荡器的背景下详细阐述的想法。与可比较的激光振荡器相比，由于没有热透镜效应，这里的输出功率仅受泵浦激光器功率的限制。通过用自制的基于薄盘的飞秒高功率激光器泵浦，我们将接近平均输出功率的数瓦级。来自NOPO的稳定脉冲串形成宽带模式梳，这将分别对其相干特性和定时抖动进行深入研究。高功率模式梳的这一非常新的概念允许有效的频率转换到远程波长区域，特别是近UV。