Near Resonant Optical Absorption by a System Coupled with Two Laser Beams


  • A. S. Sizhuk Department of Radiophysics, Taras Shevchenko Kyiv National University
  • G. Dong Physics Department, East China Normal University



two-laser beam spectroscopy, absorption coefficient, quantum optics, many-body interaction, non-linear optics


The structure of a solution of the generalized Maxwell–Bloch system of equations describing the strongly pumped interacting two-level atoms is discussed. This structure is represented by means of the corresponding differential equations for each contributing process. The interaction between the processes is introduced through the interaction integral and is illustrated by the specific system of graphs. The method allows one to describe the quantum-field-induced long-range interaction prevailing over short-range collisions and causing the broadening, narrowing, and shifts of an absorption line shape. The description is given in terms of the interaction integrals which couple the collective atomic polarization and population inversion. The contributions from different effects are analyzed with the use of the additivity of the corresponding absorption/reemission rates.

Author Biography

G. Dong, Physics Department, East China Normal University

Physics Department, Prof.


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How to Cite

Sizhuk, A. S., & Dong, G. (2020). Near Resonant Optical Absorption by a System Coupled with Two Laser Beams. Ukrainian Journal of Physics, 65(4), 277.



Optics, atoms and molecules