We have measured the scattered-light intensity as a function of the scattering angle for light scattered from soot particles in a premixed methane/oxygen flame. This yields the optical structure factor for the soot particles. We find that the structure factor shows the soot particles to have a morphology consistent with a fractal interpretation with a fractal dimension in the 1.6

A mid-infrared frequency converter with a nonlinear crystal, Ag x Ga x Ge(1-x)S4 (AgGaGeS4), for x=0.5 has been reported by the second harmonic generation of tunable CO2 laser radiation. Two pole coefficients of Sellmeier equations are also presented.

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