<title>Board-to-board parallel optical interconnects using large-diameter graded-index polymer optical fiber (GIPOF)</title>

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In this paper, we investigate the imaging properties of curved large diameter (approximately mm) Gradient Index Polymer Optical Fiber (GIPOF) for massively parallel optical interconnects. We consider that in such large fiber light can propagate following the law of geometrical optics. A program of ray-tracing through curved GIPOF has been developed based on an algorithm proposed by Sharma et al. From simulations we found out that some S-shaped fiber patterns can fulfill at the requirements needed for flexible parallel board-to-board optical interconnects, namely small spot size, low distortion and high transmission efficiency if small divergence angle sources such as VCSELs are used. However the shape and the length of the fiber should be well controlled and the displacement between optoelectronic chips should not exceed a few centimeters.

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