In this paper, we present the design of a SiON-based grating-assisted codirectional coupler for dissimilar waveguides, based on an accurate numerical method. All the design parameters, including coupling length and coupling efficiency, have been calculated at the free-space optical wavelength of lambda. = 1.54 mu m for both TE and TM polarisations as a function of grating height, thickness of the coupled slabs, gap thickness between the two coupled planar waveguides. It is shown that efficient ( up to 70%) and polarisation independent vertical couplers can be realised
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Titolo: | Design of SiON-based grating-assisted vertical directional couplers |
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Data di pubblicazione: | 2006 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1364/OE.14.001055 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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