Analysis of optical rib self-imaging multimode interference (MMI) waveguide devices using the discrete spectral index method |
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Authors: | G M Berry S V Burke |
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Institution: | (1) Department of Physics and Astronomy, University of Wales College of Cardiff, CF2 3YB Cardiff, UK |
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Abstract: | We have developed a semianalytical approach to study the propagation characteristics of multimode interference (MMI) waveguide structures. The effect of transverse crosssection geometry on self-imaging length and optical power throughput are investigated. We present results confirming that the nonquadratic modal dispersion encountered in stripe-loaded waveguides impairs self-imaging performance. Results indicate that the image degradation is more predominant for asymmetrically fed MMI waveguides. |
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