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Multimode Polymer Waveguide Components for Complex On-Board Optical Topologies
DOI:10.1109/JLT.2013.2278382.png)
摘要
En 中文
Multimode polymer waveguides are an attractive transmission medium for board-level optical links as they provide high bandwidth, relaxed alignment tolerances, and can be directly integrated onto conventional printed circuit boards. However, the performance of multimode waveguide components depends on the launch conditions at the component input, complicating their use in topologies that require the concatenation of multiple multimode components. This paper presents key polymer components for a multichannel optical bus and reports their performance under different launch conditions, enabling useful rules that can be used to design complex interconnection topologies to be derived. The components studied are multimode signal splitters and combiners, 90 degrees-crossings, S-bends, and 90 degrees-bends. By varying the width of the splitter arms, a splitting ratio between 1% and 95% is achieved from the 1 x 2 splitters, while low-loss signal combining is demonstrated with the waveguide combiners. It is shown that a 3 dB improvement in the combiner excess loss can be achieved by increasing the bus width by 50 mu m. The worst-case insertion loss of 50 x 100 mu m waveguide crossings is measured to be 0.1 dB/crossing. An empirical method is proposed and used to estimate the insertion losses of on-board optical paths of a polymeric four-channel optical bus module. Good agreement is achieved between the predicted and measured values. Although the components and empirical method have been tailored for use in a multichannel optical bus architecture, they can be used for any on-board optical interconnection topology.
Keyword:
Optical interconnections
optical polymer
optical waveguides
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IF:
4.8
论文数:
1.7W
被引数:
3.8W
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