Space division switching system for communication networks using

Details Space division switching system for communication networks using Space division switching system for communication networks using

1979-04-18

1981-03-17

Brown, Thomas W.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

179 18J, 179 81R, 179 84T, 350 378, 455607, 455612, 455613, G02B 532, H04B 900, H04M 100, H04Q 348

Patent

active

042569273

ABSTRACT:
According to a feature of this invention, there is provided a space-division and control system for a network operating with space-division switching of information modulating optical carrier frequencies, wherein the switches are arranged between a plurality of inlets and a plurality of outlets and are light deflection hologram elements that can store a plurality of holographic optical arrays, each switch being associated to an inlet from which it receives an impinging light wave and in each switch each holographic optical array deflecting the impinging light wave along a direction of an order different from the O-order direction toward an outlet selected among the plurality of outlets, wherein in the O-order direction of each switch there is a photodetector whose output signals reflect the lit or unlit condition of the associated inlet and are transmitted to the switching control unit of the space-division and control system.

REFERENCES:
patent: 3651498 (1972-03-01), Magill et al.
patent: 3831035 (1974-08-01), Hill
patent: 3985975 (1976-10-01), Steensma
"Optical Memory used in Wave Band Data Communication", by Lacroix et al., Second European Electro-Optics Markets and Technology Conference [undated].

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