Yq. Yang et al., STUDY OF DEGENERATE 4-WAVE-MIXING BASED ON EXCITED-STATE ABSORPTION IN METHYL ORANGE POLYVINYL ALCOHOL POLYMER FILM/, Journal of luminescence, 66-7(1-6), 1995, pp. 133-135
In this paper, the kinetic processes of degenerate four-wave mixing (D
FWM), based on excited-state absorption, was studied for the first tim
e and explained with a four-level model. The lower triplet state was s
ignificantly populated through intersystem crossing from an excited si
nglet state and degenerate four-wave mixing based on triplet-triplet a
bsorption was achieved. Experimental results from methyl orange doped
in polyvinyl alcohol film were in good agreement with calculations.