Interaction of radiation with an active medium in a multimode regime of pulse generation

E G Lariontsev, I. P. Skuibina

E. R. Kocharovskaya, N. S. Ginzburg, Alexander S. Sergeev

Using one-dimensional semiclassical Maxwell — Bloch equations with account for the coherent polarisation dynamics, we have studied spike generation regimes of a superradiant distributed feedback laser in the case of inhomogeneous broadening of the spectral line of an active medium. By analysing the dynamic spectra of inversion of the active medium and laser radiation, we have revealed the relationship of individual spikes of radiation and their modulation with specific parts in the spectral line of the active medium and mode beatings. It has been shown that the broadening and shift of the lasing spectrum with respect to the initial electromagnetic Bragg-cavity modes is accompanied by a strong spectral gradient of inversion that is typical of the superradiant regimes.

G. N. Zmievskoi, M. V. Sviridov

Richard M. Friedberg, Sven R. Hartmann

Igor' M Bel'dyugin, Iosif G. Zubarev, С И Михайлов

A theoretical analysis is made of stimulated Raman scattering of multimode pump radiation in a dispersive active medium. Gain increments and the form of the scattered field are determined for arbitrary lengths of active medium and pump intensities.

Alvin Katz, R. R. Alfano