Nonlinear optical phenomena

Peculiarities of the evolution of a precursor pulse in the shaping of quasi-resonance self-induced transparency pulses

A. E. Dmitriev, O. M. Parshkov

Yuri Gagarin State Technical University of Saratov

Abstract: The results of a numerical simulation of the evolution of a precursor pulse are presented. This pulse exists at the stage of the conversion of a quasi-resonance input pulse into a 2π pulse considered in the theory of self-induced transparency. Calculations have shown that the efficiency of precursor-pulse formation increases as the input laser pulse shortens and its area approaches π. The results of a numerical analysis of the known experiments on the observation of a precursor pulse in ruby crystals are also presented. In one of the cases considered, the calculation results cast some doubt on the interpretation of the experiment adopted earlier.

PACS: 42.50.Md

Received: 11.11.2003
Revised: 19.04.2004

 English version: Quantum Electronics, 2004, 34:8, 739–743

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