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Studies a design of an alignment-detection system which uses off-axis diffractive elements and photodetectors for detecting the real-time misalignment of an array of optical beams. Presentation of the design of the alignment-detection system; Examination of an experimental performance of a prototype scheme; Operation of the alignment-detection system; Information on the design of the alignment-detection system.

Presents the design of a four-stage unidirectional ring free-space optical interconnect system. Use of this optical system; Overview of free-space optical interconnects; Highlights of an optical relay system.