Low-loss multimode waveguides crossings and turning mirrors |
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Authors: | CL Chiu TS Lay |
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Institution: | a Institute of Electro-Optical Engineering, Department of Photonics, National Sun Yat-Sen University, No. 70, Lienhai Road, Kaohsiung 804, Taiwan b Department of High Speed Electronics Research, Alcatel-Lucent Technologies Bell Labs Innovations, 600 Mountains Avenue, P.O. Box 636, Murray Hill, NJ 07974-0636, USA |
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Abstract: | We develop a new design that the perturbation is the minimum when the crossing occurs at the self- image location in a low-loss multimode waveguide. We use a center-fold low-loss multimode waveguide with a single self image at the center. Such waveguides can cross at 90 degrees or 60 degrees at the center with minimal cross talk. One can reflect the incident mode into an intersecting waveguide by introducing an idea reflecting plane. In practice, the reflector is replaced by a plane for total internal reflection with correction for Goos-Hanchen shift. |
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