Tuning of the Spectral Characteristics of Terahertz Quantum-Cascade Lasers

Terahertz quantum-cascade lasers (THz QCLs) are promising radiation sources for high-resolution gas spectroscopy. A wide operating-frequency band (from 1.2 to 5.4 THz), a narrow generation line (up to 10 kHz), the ability to operate on several radiative transitions (two-color lasers, generation of f...

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Bibliographic Details
Published in:Nanobiotechnology Reports (Online) 2022-12, Vol.17 (Suppl 1), p.S35-S40
Main Authors: Khabibullin, R. A., Pushkarev, S. S., Galiev, R. R., Shchavruk, N. V., Dyuzhikov, I. N., Pavlovskiy, V. V., Volkov, O. Yu
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Energy transfer
Industrial and Production Engineering
Injection current
Machines
Manufacturing
Materials Science
Nanotechnology
Operating temperature
Processes
Quantum cascade lasers
Radiation sources
Spectrometers
Terahertz frequencies
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Summary:Terahertz quantum-cascade lasers (THz QCLs) are promising radiation sources for high-resolution gas spectroscopy. A wide operating-frequency band (from 1.2 to 5.4 THz), a narrow generation line (up to 10 kHz), the ability to operate on several radiative transitions (two-color lasers, generation of frequency combs) and other unique characteristics of THz QCLs make it possible to create gas spectrometers of a new generation for biomedical and environmental applications. In this paper, we consider the possibility of controlling the spectral characteristics of THz QCLs by changing the operating temperature and injection-current pulse parameters: amplitude, duration, and repetition rate. The energy transfer between longitudinal Fabry–Perot modes in THz QCLs is studied for the first time with a change in the duty cycle of the injection-current pulse cycle.
ISSN:2635-1676
1995-0780
2635-1684
1995-0799
DOI:10.1134/S2635167622070102