Intensity dependence of harmonic generation in 10-μm laser-produced plasmas

Abstract
Integral harmonic intensities in the radiation scattered from nanosecond 10.6‐μm laser‐target interaction have been studied as a function of laser energy and target orientation. Measurements suggest a power‐law dependence of scattered harmonic intensity with increasing laser intensity, Inω0Inω0, up to ∼1×1014 W/cm2 incident with evidence of saturation above this level. The scattered harmonic light at 7ω0 was found to be fairly isotropic in front of the target.

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