Abstract
We have studied the spectral and dynamic characteristics of quantum cascade lasers emitting in the long-wavelength infrared range. It is shown that lasers with a short cavity (~1 mm) make it possible to obtain frequency combs in a very wide spectral range. We have investigated the spectral dynamics in the frequency comb generation regime. It is demonstrated that the intensity of longitudinal laser modes varies during a pump pulse propagation. We have observed simultaneous generation of all longitudinal modes of a frequency comb over a pump pulse segment with a constant amplitude.
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ACKNOWLEDGMENTS
This study was supported by the Ministry of Science and Higher Education of the Russian Federation, unique project identifier no. RFMEFI61619X0111.
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Translated by N. Wadhwa
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Dudelev, V.V., Mikhailov, D.A., Babichev, A.V. et al. Spectral Dynamics of Quantum Cascade Lasers Generating Frequency Combs in the Long-Wavelength Infrared Range. Tech. Phys. 65, 1281–1284 (2020). https://doi.org/10.1134/S106378422008006X
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DOI: https://doi.org/10.1134/S106378422008006X