Study of four-wave mixing based on excited state absorption
Xinxian Bao, Chunfei Li
Azo dye polymeric film were widely studied for real-time polarization holography and optical storage by degenerate four-wave mixing in the resonant absorption spectrum of the sample in the few past years. In this paper, we will report the experimental results of four-wave mixing based on excited-state absorption in ethyl orange doped in polyvinyl alcohol film. A He-Ne laser was used as the four-wave mixing source, and the excited light was an Ar+ beam. To explain the experimental results, a simplex four-level model of azo molecule polymeric system is built up. The dynamic process of phase conjugation signal by excited-state four- wave mixing is calculated through solving the rate equation of population in the excited-state. The theoretical analyses agree with the experimental results well. The excited-state optical storage mechanism of sample is discussed.
Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Oct 25, 1996•0 citations