报告题目：Modern ultrafast laser technology for spectroscopy, imaging and material processing applications
报告人：Oleg Pronin 教授
报告人单位：Helmut Schmidt University
主持人：张文斌青年研究员
地点：光学大楼B325会议室
时间：2024年3月19日（周二）上午09:30
报告摘要：
In this talk, I will review the recent developments in ultrafast laser technology in the last decade. Mainly I will focus on the thin-disk femtosecond oscillators and nonlinear optics in multipass cells. I will present the world’s highest peak power oscillator developed in my research groups. The oscillator delivers 200 W average power, 14 MHz repetition rate, and 110 MW peak power with 120 fs pulse duration. This output is being spectrally broadened and compressed in the cascaded nonlinear multipass cells down to 8 fs and increasing peak power to nearly 1 GW. The output covers a spectral range of 800-1300 nm simultaneously. The XUV light source driven by this compact powerful source is currently being developed in my research group. Moreover, together with our spin-off company n2-Photonics, we are able to spectrally broaden and temporally compress the output of the commercial Yb lasers delivering >300 fs (for example, Pharos from Light Conversion) down to sub 7 fs with >80% efficiency. This way, we bring pulses with <50 fs pulse duration and peak powers exceeding >100 MW for the first industrial applications. I will address the first use of <50 fs pulses for glass ablation and multiphoton microscopy. I hope that, with all the technological developments presented in my talk, we can enable and open more applications. The future is bright.
报告人简介：
Oleg Pronin was born in Ertil, Russia, in 1985. He received a Diploma degree in solid-state physics from Moscow Engineering Physics Institute (Technical University) in 2008, and a Ph.D. degree in physics from the Ludwig Maximilian University of Munich, Germany, in 2012 under the supervision of Prof. Ferenc Krausz. From 2012 to 2014, he was a Postdoctoral Scientist with the Ludwig Maximilian University of Munich. From 2014 to 2019, he was a Group Leader at the Max Planck Institute of Quantum Optics, Garching, Germany. Since 2019 he is a full professor at Helmut Schmidt University in Hamburg, Germany. He has co-authored over 30 articles and holds several patents. He is a co-founder of n2-Photonics start-up company. His research interests include soliton mode-locking and instabilities, the development of high-power femtosecond 1-μm and 2-μm thin-disk oscillators, ultra-broadband mid-infrared frequency combs, nonlinear spectral broadening in solids, carrier-envelope-phase stabilization and few-cycle pulse generation.