Hybrid dielectric/AlGaAs mirror spatially filtered vertical cavity top-surface emitting laser
- 6 March 1995
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 66 (10) , 1157-1159
- https://doi.org/10.1063/1.113842
Abstract
A novel AlGaAs/AlAs–TiO2/SiO2 hybrid distributed Bragg reflector is implemented in a planar vertical cavity (top)‐surface emitting laser (VCSEL) to control emission (near 850 nm) to a single TEM00‐like mode. This structure exhibits ≳30 dB side‐mode suppression ratio and constant divergence (or modal profile) throughout its operating range (i.e., the detrimental effects of thermal lensing inherent in implanted VCSELs are eliminated); moreover, a record low threshold voltage ≂1.6 V, (0.16 V above photon energy) is obtained, without sacrificing the producibility of the standard all‐epitaxial structure.Keywords
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