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DOI: 10.17586/1023-5086-2024-91-07-13-24
УДК: 621.373:535
Changes in the spectrum and structure of polariton modes of a class C laser under the action of distributed feedback of waves
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Кочаровский Вл.В., Мишин А.В., Кочаровская Е.Р. Изменения спектра и структуры поляритонных мод лазера класса C под действием распределенной обратной связи волн // Оптический журнал. 2024. Т. 91. № 7. С. 13–24. http://doi.org/10.17586/1023-5086-2024-91-07-13-24
Kocharovsky Vl.V., Mishin A.V., Kocharovskaya E.R. Changes in the spectrum and structure of polariton modes of a class C laser under the action of distributed feedback of waves [in Russian] // Opticheskii Zhurnal. 2024. V. 91. № 7. P. 13–24. http://doi.org/10.17586/1023-5086-2024-91-07-13-24
Subject of study. Characteristic and dispersion equations of modes of a class C laser as well as a spectrum of these modes. Aim of study. Determine how the field structure, frequencies and wavenumbers of modes depend on laser parameters. Method. Numerical modeling of the characteristic and dispersion equations of a class C laser, analytical estimates in a number of special cases. Main results. The structure, frequencies and growth/decay rates of polariton modes are analyzed depending on the distributed-feedback coefficient of counterpropagating waves and the level of population inversion created by pumping for typical parameters of a superradiant laser with an open combined Fabry–Perot cavity with the distributed-feedback coefficient of counterpropagating waves, in which the photon lifetimes are less than or on the order of the phase relaxation time of optical dipole oscillations of active centers. It is shown that changing the value of the distributed feedback of counterpropagating waves makes it possible to effectively control the spectrum of polariton modes of the laser, in particular, to achieve lasing at frequencies inside the photonic bandgap defined by it, from which electromagnetic modes are displaced. Practical significance. The results obtained in this work show how a change in a number of laser parameters affects the spectrum of modes, which is required to control laser generation.
polariton modes, low-Q combined cavity, superradiant laser, distributed feedback, mode spectrum, photonic bandgap
Acknowledgements:the work was carried out with financial support from the Ministry of Education and Science of the Russian Federation within the framework of the state assignment of the Institute of Applied Physics of the RAS № FFUF-2023-0002.
OCIS codes: 140.3430, 140.6630, 030.1670
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