报告名称:  Sub-cycle Parametric Waveform Synthesizer for Attosecond Science

　　　　　　　用于阿秒科学的亚周期参量波形相干合成光源

　　报告人:  杨煜东

　　             德国电子同步加速器研究所(DESY)

　　报告时间:  2019年12月27日（周五）13:30

　　报告地点:  瞬态室三楼会议室

　　报告摘要

　　The ability to generate arbitrarily-shaped intense light transients across the entire optical range implies the maturity of ultrafast laser technology which allows us to master a new level of coherent control over strong-field interactions. In this talk, the parallel synthesis of multi-stage optical parametric amplifiers will be shown. The realization of the parametric waveform synthesizer with mJ level output pulse energy as well as exquisite waveform control and stability clears the way towards the generation of tailored optical waveforms with energy, average power and bandwidth scalability. The complete multi-phase controlled synthesized waveforms, which spectrally span over 1.7 octaves with FWHM durations down to 2.8 fs, i.e. 0.6 optical cycles at a central wavelength of 1.4μm, enables the direct generation of isolated attosecond pulses via high-harmonic generation without a need for additional gating methods. Attosecond streaking measurements are performed to characterize the synthesized optical transients as well as the generated attosecond pulses and to showcase the stability of the synthesized waveforms.

　　报告人简介

　　杨煜东，现为德国电子同步加速器研究所(DESY)博士后，长期从事强场超快光学研究工作。2017年于汉堡大学取得博士学位，博士导师为Franz X. Kaertner教授。之前其于2012年和2009年分别在北京大学和中山大学取得硕士和学士学位。目前其主要研究方向包括近红外少/亚周期超快光源，超短脉冲的相干合成，基于高次谐波方法的极紫外/软X射线阿秒光源以及阿秒物理等。