Incoherent/coherent source array for multiplexed holographic recording and readout
US5339177A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1992 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Feb 13, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/265
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a novel source array comprising a plurality of sources of optical illumination that are at once both individually coherent and mutually incoherent. A primary application of such a source array is to provide the requisite optical source beams in a novel architecture and associated apparatus for the development of highly multiplexed photonic interconnection networks and holographic optical elements with maximum optical throughput efficiency and minimum interchannel crosstalk, based on parallel incoherent/coherent holographic recording and readout principles that are described herein. In one embodiment, the source array is configured from a plurality of coherent sources of illumination; in a second embodiment, a single source of coherent illumination is expanded to illuminate a phase modulator array, within which each separate phase modulator is driven at a distinct oscillation frequency such that the set of resultant modulated beams exhibits mutual incoherence. Such incoherent/coherent source arrays are critical for providing arbitrarily weighted and independent interconnections, which in turn are of potential importance in the development of neuro-op…
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