Design, implementation and characterization of a folded spot array generator for a modulator-based free-space optical interconnect

摘要

A folded structured light generator is presented. This spot array generator is bobe used in a modulator-based free-space optical interconnect. Three cascaded diffractive optical elements produce 4 x 8 clusters on an 800 3mu m X 1600 mu m pitch, where each cluster is a 4x4 array of 13.1- mu m-radius spot on a 90- mu m pitch. The folded configuration is more compact than an existing linear spot array generator. Details of the optical design and assembly issues are presented.