GaAs-AlGaAs double heterostructure lasers with taper-coupled passive waveguides
- 1 May 1975
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 26 (9) , 516-518
- https://doi.org/10.1063/1.88239
Abstract
Taper‐coupled laser structures suitable for integrated optics applications were grown by a liquid phase epitaxy process. Reduced threshold current densities, j0=6.3 kA/cm2 μm, and external differential quantum efficiencies ηd as high as 28% were measured with nominally undoped n‐type active layers. Control units yielded j0=5.3 kA/cm2 μm with ηd as high as 37%. An internal quantum efficiency of 78% and a taper coupling efficiency ≳50% are deduced from the data.Keywords
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