Chinese Optics Letters, 2015, 13 (12): 121401, Published Online: Sep. 12, 2018
Ultrafast laser system based on noncollinear optical parametric amplification for laser spectroscopy Download: 1048次
140.7090 Ultrafast lasers 320.7150 Ultrafast spectroscopy 320.6629 Supercontinuum generation 300.6530 Spectroscopy, ultrafast
Abstract
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 unconverted 800 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.
Dongjia Han, Yanyan Li, Juan Du, Kun Wang, Yongfang Li, Tomohiro Miyatake, Hitoshi Tamiaki, Takayoshi Kobayashi, Yuxin Leng. Ultrafast laser system based on noncollinear optical parametric amplification for laser spectroscopy[J]. Chinese Optics Letters, 2015, 13(12): 121401.