Abstract
Iodoform dissolved in various solvents was irradiated with a Q-switched ruby laser. The two-photon photolysis was studied by measuring the concentration of the liberated iodine. Different two-photon absorption cross sections were obtained for iodoform in different solvents. The major solvent effect was found to be due to the self-focusing properties of the medium. After appropriate corrections for this effect, good agreement was obtained between measured and calculated cross sections. It was also found that the self-focusing length of a liquid could be determined “chemically” from the degree of photolysis.
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