Room Temperature Lasing of Single-Mode Arched-Cavity Quantum-Cascade Lasers.

Authors :: Babichev, A. V.
Gladyshev, A. G.
Kurochkin, A. S.
Dudelev, V. V.
Kolodeznyi, E. S.
Sokolovskii, G. S.
Bugrov, V. E.
Karachinsky, L. Ya.
Novikov, I. I.
Denisov, D. V.
Ionov, A. S.
Slipchenko, S. O.
Lyutetskii, A. V.
Pikhtin, N. A.
Egorov, A. Yu.
Source :: Technical Physics Letters; Apr2019, Vol. 45 Issue 4, p398-400, 3p
Publication Year :: 2019
Abstract: Single-mode lasing at room temperature in quantum-cascade lasers (QCLs) with arched cavity design has been demonstrated. The output optical power in single-mode lasing regime at ~7.7-μm lasing wavelength was above 6 mW with a side-mode suppression ratio of up to 25 dB. The QCL heterostructure for the arched cavities was grown by molecular-beam epitaxy (MBE) based on a heterojunction of In<subscript>0.53</subscript>Ga<subscript>0.47</subscript>As/Al<subscript>0.48</subscript>In<subscript>0.52</subscript>As solid alloys, lattice-matched with InP substrate, and InP layers performing the function of waveguide claddings. [ABSTRACT FROM AUTHOR]