Mixing of krypton and CO₂laser radiation in proustite

Infrared radiation (λ = 10.6 μ) was converted to visible radiation (λ = 0.689 μ) in a proustite crystal pumped by a krypton ion laser (λ = 0.647 μ). The conversion efficiency was determined for two interaction configurations, one of which was collinear and the other perpendicular. In the collinear interaction the power conversion efficiency was 2·10–6 for focused pump and signal radiations.