Abstract
The temperature characteristics of arched-cavity quantum-cascade lasers with different geometrical dimensions emitting in the spectral range of 7–8 μm are studied. The laser heterostructure was grown by molecular-beam epitaxy. The active region consisted of 50 cascades based on a heteropair of In0.53Ga0.47As/Al0.48In0.52As solid alloys. Single-mode lasing is demonstrated for lasers with the semicircular cavity segment 100 μm in diameter and the linear segment 1 mm long. The maximum side-mode suppression ratio at a temperature of 290 K was 26 dB, and the emission wavelength was 7.73 μm.
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Funding
This work was supported by the Russian Foundation for Basic Research (project no. 16-29-03289). The work by D.A. Firsov and L.E. Vorobjev was partially supported by the Ministry of Education and Science of the Russian Federation (state order no. 3.933.2017/4.6).
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Babichev, A.V., Pashnev, D.A., Denisov, D.V. et al. Study of the Spectra of Arched-Cavity Quantum-Cascade Lasers. Opt. Spectrosc. 128, 702–706 (2020). https://doi.org/10.1134/S0030400X20060028
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DOI: https://doi.org/10.1134/S0030400X20060028