题目：Burst-Mode Lasers: Toward MHz-rate Diagnostics in Reacting and non-Reacting Flows

时间：2019年6月4日 9:00-10:30

地点：必赢线路检测中心 F310会议室

邀请人：齐飞 教授（内燃机研究所）

Biography

Dr. Mikhail Slipchenko is a Research Associate Professor in the School of
Mechanical Engineering at Purdue University. His research activities are focused on development of laser systems and spectroscopic methods in the area of combustion diagnostics, as well as linear and nonlinear optical spectroscopy and microscopy, including Raman and coherent Raman techniques. Dr. Slipchenko has developed a number of pulse-burst laser systems for high-speed linear and non-linear optical diagnostics. Dr. Slipchenko is also a Senior Research Scientist at Spectral Energies, LLC, where his work is focused on developing a commercial high-repetition-rate high-energy burst-mode laser systems for reacting and non-reacting flow diagnostics. Before joining Spectral Energies, LLC Dr. Slipchenko was a Research Scientist in the Biomedical Engineering department at Purdue University from 2008-2012 and worked on the development of high resolution, label-free chemical imaging techniques based on coherent Raman scattering. He was a post-doctoral research associate in the Departments of Chemistry and Mechanical Engineering at Iowa State University from 2005-2008 after earning his Ph.D. in 2005 from the University of Southern California. Dr. Slipchenko is a coauthor of 83 peer-reviewed journal publications, 3 book chapters, and 8 patents.

Abstract

Understanding gas-phase combustion reactions in turbulent flows requires high-speed planar or tomographic imaging with multi-kHz to MHz frame rates. Continuously pulsed laser systems are insufficient to provide the energy needed for measuring key performance parameters. The alternative to continuously operated pulsed lasers are burst-mode lasers, which produce short bursts of high-energy pulses up to MHz rates. The Joule per pulse energies achievable with this new laser architecture at kHz rates allows to utilize such pule-energy demanding spectroscopic techniques as Rayleigh, Raman, and Thomson scattering, as well as for pumping an optical parametric oscillator (OPO) and dye lasers to access a variety of combustion intermediates. Our team is focused on developing burst-mode lasers for combustion and flow diagnostics. Here the latest advances in burst-mode laser technology, its applications, and new developments will be presented.