Abstract
In integrated optics, tapered waveguides usually possess step changes in waveguide width or other dimensions, due to lithographic limitations. We present a theoretical asymptotic analysis of the effect of these steps when compared with the ideal smooth taper. We present some figures for the size of the effect, conclude that the effect is significant in certain situation and that making the taper too long will reduce its performance, or in the worst instance cause the taper to function as badly as a butt join.
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Felici, T.P., Gallagher, D.F. On propagation through long step tapers. Optical and Quantum Electronics 33, 399–411 (2001). https://doi.org/10.1023/A:1010842817125
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DOI: https://doi.org/10.1023/A:1010842817125