Journal
Scientific and technical journal of information technologies, mechanics and optics
UDK535.1
Issue:4 (68)
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THIRD HARMONIC GENERATION AT REFLECTION FROM CRYSTAL OF HIGH-INTENSITY FEMTOSECOND RADIATION
Annotation
Experimental results of the reflection of femtosecond radiation with a power density of 4 TWt/cm2 and duration of ~ 40 fs from nonlinear crystal of LiF at light falling to medium boundary close to normal were presented. The generation of triple frequency radiation was observed at the reflection from the front face of the crystal. Spatial distributions of triple frequency beam and fundamental beam were recorded. Energy of triple frequency radiation was 10-4 of the energy of the incident radiation. Half-width of light beam spatial distribution on the triple frequency radiation happens to be three times narrower than fundamental beam half-width.
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