Optical EngineeringRight choice for optical bus interconnect: metallic-hollow-core-waveguides or multimode polymer waveguides?
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The performance of metallic-hollow-core-waveguides (MHCWs) and multimode polymer waveguides (MMPWs) are numerically evaluated using ray-tracing method for complex board level optical interconnects systems such as optical bus. Based on an ideal model neglecting the waveguide surface roughness, we find that MHCWs will provide lower optical loss for small curvature bending waveguides, 45 deg micro-mirror couplers and optical beam splitters, while MMPWs shows a better optical transmission for straight waveguides. The conclusion is that MHCWs will be a better choice than MMPWs for complex optical bus architectures in terms of performance, cost and stability.