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

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Abstract

A folded structured light generator is presented. This spot generator is to be used in a modulator-based free-space optical interconnect. Three cascaded diffractive optical elements produce 4 × 8 clusters on an 800 µm × 1600 µm pitch, in which each cluster is a 4 × 4 array of 13.1-µm-radius spots on a 90-µm pitch. The folded configuration is more compact than an existing linear spot-array generator and replaces 14 optical surfaces with eight surfaces. Details of the optical design, sensitivity analysis, alignment techniques, assembly, and test results are presented.

© 2003 Optical Society of America

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