Ultrabroadband four wave mixing of few-cycle mid-infrared pulses for characterization of their temporal shape and time-domain spectroscopy

The International Symposium on Photonics and Optoelectronics(SOPO 2014)——Combination of ultrashort pulses in the mid-infrared and nonlinear-optical methods of pulse characterization can be considered as a powerful tool for spectroscopic applications. We demonstrate that cross-correlation frequency-resolved optical gating (XFROG) based on four-wave mixing (FWM) in a gas medium is shown to enable a broadband dispersion-free characterization of a few-cycle output of difference-frequency generation (DFG) in the 3–15-m wavelength range. The spectral modulation of an ultrashort mid-infrared pulse induced by molecular vibrational modes can give rise to high-visibility interference patterns and well-resolved echo revivals in the time domain, which can be read out by means of XFROG based on broadband FWM in a gas phase, suggesting a powerful tool for the detection, recognition, and remote sensing of molecular vibrations and rotations.

关键词： 激光脉冲 时域光谱技术 分子振动 The International Symposium on Photonics and Optoelectronics(SOPO 2014)

主讲人：A.P. Andrei B.Fedotov 机构：M.V.Lomonosov Moscow State University

时长：0:20:47 年代：2014年