extremely short light pulses, reflection of extremely short light pulses, nonlinear crystal LiF, generation of the third harmonic " />

THIRD HARMONIC GENERATION AT REFLECTION FROM CRYSTAL OF HIGH-INTENSITY FEMTOSECOND RADIATION

O. . Mokhnatova, S. E. Putilin, V. G. Bespalov, S. A. Kozlov


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Abstract

 

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.

Keywords:   extremely short light pulses, reflection of extremely short light pulses, nonlinear crystal LiF, generation of the third harmonic
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