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CRC Press eBooks

Saturation of Dye Solution in Principal Channel by Using Two Light Fields

C Arcoumanis, K.T.V Grattan

Published Jul 10, 2014• 0 citations
Publisher

Abstract

Einstein coefficients for many nonlinear medium [2] . In three-level configuration the dye solution can be excited by light fields with two different frequencies, one group of light can involve nonlinear processes, and other light fields act in second channel to control the nonlinear processes in first channel [3] .
DOI
10.1201/b16835-30

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The four-level model is used to study the nonlinear media with coincident absorption and emission bands in both principal (S0S1) and excited (T1T2) channels.The excitation of molecules occurred by two light elds: radiations with intensity I12 at frequency ω0 tuned at the centre of absorption band of principal singletsinglet channel and radiations with intensity I34 at frequency ω tuned at the centre of absorption band of excited triplettriplet channel.The monotonic dependence of phase response of media in both principal and excited channels and the saturation processes are studied theoretically and numerically for four-level model.