1-TO-(NXN) OPTICAL FAN-OUT MODULE FOR OPTICAL INTERCONNECTS

Based on the structure of substrate-mode holograms, a new type of 1-to -(N x N) optical fan-out module which consists of two layers of gratin g arrays for optical interconnects is presented. The first and second layer have a I x N grating array and a N x N grating array, respective ly. By suitably choosing the diffracted angle and diffraction efficien cy of every grating, similar diffraction will be performed repeatedly at every grating. Finally, N x N output beams are obtained.