Saturation Processes in Nonlinear Media Modeled by Four-Level Configuration with Coincident Absorption and Emission Bands |
| J.S.M. Addasi
Applied Physics Department, Faculty of Science, Tafila Technical University, Tafila, Jordan, Taiba University, Faculty of Applied Science, Applied Physics Department, Medina, Saudi Arabia |
| Received: February 26, 2011 |
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| The four-level model is used to study the nonlinear media with coincident absorption and emission bands in both principal (S0-S1) and excited (T1-T2) channels. The excitation of molecules occurred by two light fields: radiations with intensity I12 at frequency ω0 tuned at the centre of absorption band of principal singlet-singlet channel and radiations with intensity I34 at frequency ω tuned at the centre of absorption band of excited triplet-triplet 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. |
| DOI: 10.12693/APhysPolA.122.156 PACS numbers: 78.20.Bh, 78.20.Ci |