SEMINAR
Key Laboratory of Transparent Opto-fuctional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences
中国科学院上海硅酸盐研究所透明光功能无机材料重点实验室
A novel short pulse, high energy/power diode pumped lasers in the near - and mid-IR spectral range for material science and medical applications

Speaker

Prof. Ivan Buchvarov

Physics Department, Sofia University "St. Kliment Ohridski", Bulgaria;

Feinberg School of Medicine, Northwestern University, USA

Department of Laser Technologies and Biomedical Optics , ITMO University St. Petersburg

时间：11月20日 （周四）3:00PM

地点：嘉定园区5号楼4楼会议室

联系人：徐军，徐晓东（69987734）

　　Abstract

　　The utilization of the unique mid-infrared (IR) laser radiation in materials research has produced and identified a wealth of high-impact applications and potential technology breakthroughs in these areas. Many of the laser applications require optical pulses shorter than the characteristic thermalization time of the material, and pulse energies sufficiently high enough for material ablation. In addition, the average power of the laser has to be large enough to enable “high-throughput” and acceptable product yields. Hence, kHz high energy lasers have been designed and studied. Following the above request a new technique for master oscillators have been developed: Mode-locking technique based on Chi(2)–effects at non-phase-matching condition. Soliton pulse shaping is considered to assist the Chi(2)–lens mode-locking technique and to determine the transform-limited pulse duration for a variety of laser output power and pulse repetition rate: Electro-optically Q-switched ullra-compact diode pump laser with self-injection providing, single-frequency, TEM00 – mJ output at 1-kHz repetition rate. Both of the techniques can be applied to different spectral wavelengths. Pumping a mid-IR OPO /OPA by the developed near-IR laser we have obtained high-power (>3 W) tunable laser radiation across the peak of the water absorption ~ 3 μm with an energy level (>6 mJ) at a repetition rate of 500-1000 Hz.