Study of four-wave mixing based on excited state absorption

Xinxian Bao; Chunfei Li

doi:10.1117/12.255497

25 October 1996 Study of four-wave mixing based on excited state absorption

Xinxian Bao, Chunfei Li

Proceedings Volume 2849, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications II; (1996) https://doi.org/10.1117/12.255497
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

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.

Citation Download Citation

Xinxian Bao and Chunfei Li "Study of four-wave mixing based on excited state absorption", Proc. SPIE 2849, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications II, (25 October 1996); https://doi.org/10.1117/12.255497

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KEYWORDS

Absorption

Molecules

Four wave mixing

Reflectivity

Signal processing

Helium neon lasers

Phase conjugation

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