Dielectric Highly Reflective Mirror Coatings for 4–5 μm Quantum Cascade Lasers
Bulletin of the Lebedev Physics Institute, ISSN: 1934-838X, Vol: 50, Issue: S10, Page: S1079-S1083
2023
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Article Description
Abstract: Dielectric mirrors for mid-IR quantum cascade lasers are calculated. Optimal dielectric materials are selected to minimize the absorption of laser radiation. Samples of quantum cascade lasers emitting in the spectral range of 4–5 μm and having various dielectric highly reflective mirror coatings are manufactured and their characteristics are studied. It is shown that the deposition of a highly reflective Si–SiN coating on the back face of the laser cavity leads to an increase in the output optical power of the lasers by 71% compared to control samples without coatings. The use of a Si–SiO coating makes it possible to increase the output power of the lasers by 88%.
Bibliographic Details
Allerton Press
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