Abstract
We propose to introduce a densely aligned 2$\,\times\,$4 channel polymer parallel optical waveguide with graded-index
circular cores for board-level optical interconnection, which is fabricated
using the preform method. It is verified that this novel waveguide has
sufficiently low loss (0.028 dB/cm at 850 nm and 0.061 dB/cm at 980 nm) and
high bandwidth, due to the specific characteristic of the graded-index
profile. This paper discusses insertion loss sensitivity to the displacement
of the launched beam, various inter-channel crosstalk properties, and
inter-channel skew, taking into account the real implementation of
waveguides on printed circuit boards, especially for high-speed optical
interconnects.
© 2009 US
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