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Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 19 | Page No.: 2896-2899
DOI: 10.3923/jas.2007.2896.2899
 
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Saturation Intensity in Excited Channel for Nonlinear Medium With Coincident Absorption and Emission Bands-Part I
Jihad S.M. Addasi

Abstract:
Optical properties of nonlinear medium can be considered by using a typical three-level configuration (S0-S1-S2). In this configuration the transition of molecules in principal channel (S0-S1) are occurred by the light fields of intensity I12 at frequency ω0 and the light fields with intensity I23 at frequency ω transmit the excited molecules to second excited level (S2). The absorption and other properties of dye solutions depend on the intensity of radiations and on saturation processes in excited channel, which occurred at saturation intensity I23sat. The saturation intensity in excited channel decreases with increasing radiation intensity in the principal channel. The saturation intensity I23sat, for materials with coincident absorption and emission bands, has its optimal values when the frequency of light fields in principal channel is tuned into the centre of principal absorption band. The saturation intensity in excited channel, with enough small values, achieved through effective excitation of molecules in principal channel and when the radiations in excited channel tuned into the centre of absorption and emission excited bands. The saturation intensity in excited channel affect strongly the nonlinear processes such as: four-wave mixing, holography and bistability and their control.
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How to cite this article:

Jihad S.M. Addasi , 2007. Saturation Intensity in Excited Channel for Nonlinear Medium With Coincident Absorption and Emission Bands-Part I. Journal of Applied Sciences, 7: 2896-2899.

DOI: 10.3923/jas.2007.2896.2899

URL: https://scialert.net/abstract/?doi=jas.2007.2896.2899

 
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