Case for refracting rather than diffracting optics in spatially variant interconnections.
In applications in which free-space optical interconnections need to combine high efficiency, low cross talk, and a high degree of parallelism we suggest that refracting optics is preferable to diffracting optics. If surface-relief diffracting components are to be used in high-performance systems, they must be manufactured with very high spatial resolution.
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M
Hutley