Visualization and Characterization of Pre-breakdown Processes in the Volume of a ZnGeP 2 Single Crystal During Parametric Generation of Radiation in the Wavelength Range of 3.5–5 μm when Pumped by Ho:YAG Laser Radiation
RUSSIAN PHYSICS JOURNAL(2023)
Abstract
The energy characteristics and the results of visualization of processes occurring in the volume of a crystal recorded with a digital holographic camera have been studied. It is established that the parametric generation efficiency ceases to increase when the pump energy density exceeds 1 J/cm 2 , and darkening of the laser radiation propagation channel in the crystal volume is observed. It is also shown that the transmission of laser radiation decreases when the energy densities exceed 1 J/cm 2 .
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Key words
parametric radiation generation, ZnGeP2, nonlinear crystals
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