XXVIII International Symposium ''Nanophysics and Nanoelectronics'', Nizhny Novgorod, 11-15 March 2024

Spectral combs and periodic superradiant pulses in lasers with an asymmetric cavity

Vl. V. Kocharovskii^ab, E. R. Kocharovskaya<sup>a

a</sup> Institute of Applied Physics, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
^b National Research Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, Russia

Abstract: Based on the Maxwell–Bloch equations, a numerical simulation of the regimes of asymmetric quasiperiodic generation of superradiance pulses in class D lasers with a homogeneous broadening of spectral line of a two-level active medium placed in a low-Q Fabry–Perot cavity with different reflection factors of mirrors is carried out. It is shown that in a wide range of laser parameters, the spectrum of its radiation is a comb consisting of a large number of equidistant lines and is discrete rather than continuous, despite the presence of dissipative (radiative) instability of the polarization waves with negative energy responsible for the induced collective Dicke superradiance.

Keywords: superradiant laser, asymmetric Fabry–Perot cavity, periodic pulses, spectral comb, discrete spectrum, continuous spectrum.

Received: 15.04.2024
Revised: 20.06.2024
Accepted: 20.06.2024

DOI: 10.61011/FTP.2024.04.58545.6355H

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