R. Dykstra et al., SELF-DEFOCUSING EFFECTS IN AN ETHANOL SOLUTION OF CHLOROPHYLL, Journal of nonlinear optical physics and materials, 6(2), 1997, pp. 181-192
The thermally induced optical nonlinearity in a chlorophyll ethanol so
lution is examined. A theory is presented which shows good agreement w
ith experiment. The theory models an optically thick but physically th
in medium whose only heat transport mechanism is conduction. An averag
e nz was found for the medium which corresponds well with previous res
ults but the thermal medium is shown to be fundamentally different fro
m a Kerr medium.