Imaging of the spatial distribution of atoms in a laser-produced plasma with one-dimensional coherent hyper-Raman scattering in wide-aperture beams

摘要

An experimental technique based on coherent one-dimensional four-wave mixing with hyper-Raman resonances has been developed for line-by-line imaging of excited atoms in a low-temperature plasma of optical breakdown. The technique was used to visualize the spatial dis- tribution of excited lead atoms in a plasma of optical breakdown pro- duced on a metal target. The technique of line-by-line plasma imaging was compared with the four-photon technique of point-by-point meas- urements.