Reduced-confinement antennas for GaAlAs integrated optical waveguides

Monolithically integrated reduced-confinement antennas are shown to produce reductions of >35% in the far-field beam divergence for radiation emitted from single-mode GaAlAs slab waveguides, yielding far-field beams as narrow as 8.2° FWHM along the direction perpendicular to the wafer surface. Re...

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Bibliographic Details
Published in:Applied physics letters 1990-01, Vol.56 (5), p.420-422
Main Authors: BOSSI, D. E, GOODHUE, W. D, FINN, M. C, RAUSCHENBACH, K, BALES, J. W, REDIKER, R. H
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
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Summary:Monolithically integrated reduced-confinement antennas are shown to produce reductions of >35% in the far-field beam divergence for radiation emitted from single-mode GaAlAs slab waveguides, yielding far-field beams as narrow as 8.2° FWHM along the direction perpendicular to the wafer surface. Reduced confinement of the guided mode near the output endface is achieved using a novel molecular beam epitaxy growth technique to produce a longitudinal variation in the refractive index and thickness of the waveguide film. Unlike present horn antennas, the reduced-confinement geometry has the distinct advantage of being compatible with two-dimensional antenna development.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.102776