Development and study of high-power quantum-cascade lasers emitting at 4.5 - 4.6 μm

Quantum-cascade room-temperature 4.5 - 4.6 μm lasers with different numbers of quantum cascades are developed and studied. It is shown that losses at the metallised sidewalls of the ridge waveguide considerably increase the threshold current density. It is demonstrated that the current density neede...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2020-11, Vol.50 (11), p.989-994
Main Authors: Dudelev, V.V., Mikhailov, D.A., Babichev, A.V., Savchenko, G.M., Losev, S.N., Kognovitskaya, E.A., Lyutetskii, A.V., Slipchenko, S.O., Pikhtin, N.A., Gladyshev, A.G., Denisov, D.V., Novikov, I.I., Karachinsky, L.Ya, Kuchinskii, V.I., Egorov, A.Yu, Sokolovskii, G.S.
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CURRENT DENSITY
heterostructure
high radiation power
LASERS
LOSSES
Quantum cascade lasers
quantum-cascade laser
Room temperature
TEMPERATURE RANGE 0273-0400 K
Threshold currents
WAVEGUIDES
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Summary:Quantum-cascade room-temperature 4.5 - 4.6 μm lasers with different numbers of quantum cascades are developed and studied. It is shown that losses at the metallised sidewalls of the ridge waveguide considerably increase the threshold current density. It is demonstrated that the current density needed to overcome the internal and outcoupling losses in lasers with 30 quantum cascades is an order of magnitude lower than in lasers with 15 quantum cascades.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL17396