Distributed feedback Pb1−xSnxTe double-heterostructure lasers
- 1 September 1976
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 29 (5) , 307-309
- https://doi.org/10.1063/1.89057
Abstract
Distributed feedback laser operation is demonstrated in stripe‐geometry Pb1−xSnxTe double heterostructures grown by molecular‐beam epitaxy. The grating of 1.1 μm periodicity operates in first order near 745 cm−1 (13.4 μm) under pulsed conditions in a limited range of heat‐sink temperatuers (∼30–65 K) where both gain and the Bragg reflection condition can be achieved. The guide index ng≃6.1 is consistent with theoretical estimates. In Pb1−xSnxTe DH devices, by corrugating the surface after all epitaxy is completed, a large coupling coefficient for Bragg reflection can be achieved because the last confining layer can be made very thin and the grating aspect ratio large.Keywords
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