Ultrafast laser system based on noncollinear optical parametric amplification for laser spectroscopy  

作　　者：韩冬佳 李妍妍 杜鹃 王坤 李永舫 Tomohiro Miyatake Hitoshi Tamiaki Takayoshi Kobayashi 冷雨欣 

机构地区：[1]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences [2]Laboratory of Advanced Optoelectronic Materials,College of Chemistry,Chemical Engineering and Materials Science,Soochow University [3]Department of Materials Chemistry,Ryukoku University [4]Department of Bioscience and Biotechnology,Ritsumeikan University [5]Advanced Ultrafast Laser Research Center,University of Electro-Communications [6]FSA Collaborative Innovation Center,Shanghai Jiao Tong University

出　　处：《Chinese Optics Letters》2015年第12期32-35,共4页中国光学快报（英文版）

基　　金：partly financially supported by the 100 Talents Program of CAS;the National Basic Research Program of China(Grant No.2011CB808101);the National Natural Science Foundation of China(Grant No.61475169,61221064)

摘　　要：We report the experimental demonstration of transform-limited sub-6 fs pulses at an optimal central wavelength by a tunable noncollinear optical parametric amplification（NOPA） source. Meanwhile, a white light continuum in the near-infrared（NIR） range from 900 to 1100 nm is also successfully generated by focusing the unconverted800 nm beam during NOPA generation on a sapphire rod. Both visible-pump/visible-probe and visible-pump/NIR-probe experiments are realized using the same laser system. As examples, ultrafast photo-induced exciton dynamics inside two kinds of materials are investigated by the visible-pump/visible-probe and visible-pump/NIR-probe spectroscopy, respectively.We report the experimental demonstration of transform-limited sub-6 fs pulses at an optimal central wavelength by a tunable noncollinear optical parametric amplification（NOPA） source. Meanwhile, a white light continuum in the near-infrared（NIR） range from 900 to 1100 nm is also successfully generated by focusing the unconverted800 nm beam during NOPA generation on a sapphire rod. Both visible-pump/visible-probe and visible-pump/NIR-probe experiments are realized using the same laser system. As examples, ultrafast photo-induced exciton dynamics inside two kinds of materials are investigated by the visible-pump/visible-probe and visible-pump/NIR-probe spectroscopy, respectively.

关 键 词：Band structure Infrared devices Laser spectroscopy Pumping (laser) SAPPHIRE Ultrafast lasers 

分 类 号：O437[机械工程—光学工程]