Spectral and temporal characteristics of high-power neodymium glass laser employing cascade frequency conversion in vacuum ultraviolet region

This study describes the development and investigation of a subnanosecond and picosecond source of pulse coherent radiation with output characteristics variable in the infrared, visible, and ultraviolet regions of the spectrum. Systems for recording the temporal parameters of supershort laser pulses are investigated. The generation of coherent radiation in the vacuum ultraviolet region is studied. The way in which the spatial coherence of the radiation field of a light wave changes when the radiation from a subnanosecond mode-locked laser is converted to higher-order harmonics in nonlinear crystals is established. The influence of confining processes on conversion efficiency as the pumping wavelength changes is studied experimentally, indicating that the increase in the nonlinear susceptance of Xe as the wave discrepancy becomes smaller has practically no effect on conversion efficiency due to the increased absorption of Xe in the region of the 9th harmonic, as well as the change in the index of refraction of Xe.