Transmission of a light pulse by a nonlinear medium

Rafael V Ambartsumyan, Nicolai G. Basov, V. S. Zuev +2 more

V. S. Grigor'ian, Andrei I. Maimistov, Iu. M. Skliarov

B. B. Boǐko, N. S. Petrov

Amir Ali, Mohammad Mahtab Alam, Dragan Stevan Pamucar +2 more

A gain-assisted atomic medium controls and modifies spatial solitons of reflection and transmission of structured light. Structured light pulses of reflection and transmission are generated and analyzed by azimuthal quantum numbers dependent on control driving fields in the medium. The study revealed the formation of spatial bright and dark solitons. The bright and dark soliton splitting regions are linearly increasing according to azimuthal quantum numbers of formula [Formula: see text]. Two, four, six, and eight bright and dark soliton regions are investigated with the azimuthal quantum number of [Formula: see text]. The structured light of the reflection pulse maintained a constant shape, exhibiting weak nonlinearity along the x-axis and strong nonlinearity along the y-axis. However, the structured light transmission pulse displayed varying shapes, influenced by the balanced nonlinearities along both the x- and y-axes at higher azimuthal quantum number [Formula: see text], leading to stable propagation of spatial bright solitons. These findings highlight the significant role of the structured light effect in controlling and stabilizing soliton dynamics, with potential applications in nonlinear optics, traffic flow, signal processing, plasma physics, quantum field theory, and optical soliton interferometry.

V F Litvinov, V I Molochev, В Н Морозов +3 more

An investigation was made of the properties of a two-component semiconductor (GaAs) medium and, specifically, of its transmission characteristics. It was found that the absorption coefficient was a nonlinear function of the power entering the medium. The "bleaching" theshold was determined. The spectral characteristics of the emission of a GaAs laser and of a GaAs amplifier–absorber system were determined. An experimental study was made of the reduction of the duration of the pulses transmitted by the amplifier–absorber system. Under traveling-wave conditions, the light pulses were compressed by a factor of up to 3 (down to 1 nsec). The experimental results were in agreement with the theoretical calculations.

Nicolai G. Basov, Vladilen S Letokhov