V. V. Dyudelev, D. A. Mikhailov, A. V. Babichev, G. M. Savchenko, S. N. Losev, E. A. Kognovitskaya, A. V. Lyutetskiy, S. O. Slipchenko, N. A. Pikhtin, A. G. Gladyshev, D. V. Denisov, I. I. Novikov, L. Ya. Karachinsky, V. I. Kuchinskii, A. Yu. Egorov, G. S. Sokolovskii, “Development and study of high-power quantum-cascade lasers emitting at 4.5 – 4.6 μm”, Kvantovaya Elektronika, 2020, Volume 50, Number 11,Pages <nobr>989

This article is cited in 8 papers

Lasers

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

V. V. Dyudelev^a, D. A. Mikhailov^a, A. V. Babichev^bc, G. M. Savchenko^a, S. N. Losev^a, E. A. Kognovitskaya^ad, A. V. Lyutetskiy^a, S. O. Slipchenko^a, N. A. Pikhtin^a, A. G. Gladyshev^c, D. V. Denisov^d, I. I. Novikov^abc, L. Ya. Karachinsky^abc, V. I. Kuchinskii^a, A. Yu. Egorov^b, G. S. Sokolovskii^a

^a Ioffe Institute, St. Petersburg
^b St. Petersburg National Research University of Information Technologies, Mechanics and Optics
^c Connector Optics LLC, St. Petersburg
^d Saint Petersburg Electrotechnical University "LETI"

Abstract: 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.

Keywords: quantum-cascade laser, heterostructure, high radiation power.

Received: 04.07.2020
Revised: 07.09.2020