A 1-to-30 fanout optical interconnect for planar integration applications

The use of planar integration for large fanout optical interconnection applications, based upon the concepts of diffractive and reflective optics, has recently been reported.1-3 Herein, we report on the use of multiplexed holographic diffraction gratings, and substrate wave propagation in a soda-lime glass substrate,4 to achieve a 1-to-30 channel fanout with high overall diffraction efficiency.