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- Title
Study of the Spatial Characteristics of Emission of Surface-Emitting Ring Quantum-Cascade Lasers.
- Authors
Babichev, A. V.; Mikhailov, D. A.; Chistyakov, D. V.; Kolodeznyi, E. S.; Gladyshev, A. G.; Voznyuk, G. V.; Mitrofanov, M. I.; Denisov, D. V.; Slipchenko, S. O.; Lyutetskii, A. V.; Dudelev, V. V.; Evtikhiev, V. P.; Karachinsky, L. Ya.; Novikov, I. I.; Pikhtin, N. A.; Egorov, A. Yu.; Sokolovskii, G. S.
- Abstract
The results of studies of ring quantum-cascade lasers with surface emission due to a second-order grating formed in the top cladding layers are presented. Surface emission near 7.85 μm with a low threshold current density (3.8 kA/cm2), in comparison with ridge quantum-cascade lasers of the same cavity length is demonstrated. The results of measurements of the intensity distribution of the near and far fields at different pumping levels are presented. The estimated value of the angle of beam extraction relative to the surface normal is in the range 5.7°–6.7°.
- Subjects
RING lasers; DISTRIBUTED feedback lasers; QUANTUM cascade lasers; FOCUSED ion beams
- Publication
Semiconductors, 2023, Vol 57, Issue 9, p377
- ISSN
1063-7826
- Publication type
Article
- DOI
10.1134/S1063782623070023