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Pisma v Zhurnal Tekhnicheskoi Fiziki, 2024 Volume 50, Issue 5, Pages 23–27 (Mi pjtf6621)

Tuning the emission frequency of U-shaped mid-infrared quantum cascade lasers

D. I. Kuritsyna, A. V. Antonova, S. V. Morozova, V. A. Anferteva, M. B. Chernyaevaa, V. L. Vaksa, V. V. Dyudelevb, D. A. Mikhailovb, D. V. Chistyakovb, S. O. Slipchenkob, A. V. Lyutetskiyb, A. G. Gladyshevc, A. V. Babichevd, L. Ya. Karachinskyd, I. I. Novikovd, N. A. Pikhtinb, A. Yu. Egorove, G. S. Sokolovskiib, V. I. Gavrilenkoa

a Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
b Ioffe Institute, St. Petersburg, Russia
c Connector Optics LLC, St. Petersburg, Russia
d ITMO University, St. Petersburg, Russia
e Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, St. Petersburg, Russia

Abstract: The frequency tuning of a pulsed single-frequency quantum cascade laser with U-shaped cavity was studied when the temperature varied from 300 to 10 K in the wavelength range 7.7–7.5 $\mu$m, amounting to about 35 cm$^{-1}$. The tuning of the laser frequency $\Delta\nu\sim$ 1 cm$^{-1}$ was demonstrated in a time of about 50 ns during a laser power pulse. When the laser radiation frequency was swept during a pulse at room temperature, an absorption line of water vapor in the atmosphere was observed at a frequency of 1296.7 cm$^{-1}$.

Keywords: quantum cascade laser, U-shaped cavity, frequency tuning, water vapor absorption.

Received: 29.09.2023
Revised: 26.11.2023
Accepted: 28.11.2023

DOI: 10.61011/PJTF.2024.05.57180.19746



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