Multi-stage switching network for light waveguides

Details Multi-stage switching network for light waveguides Multi-stage switching network for light waveguides

H - Electricity

04

Q

88/97.4

H04Q 3/52 (2006.01)

Patent

CA 1311384

20365-2833 ABSTRACT OF THE DISCLOSURE A multi-stage switching network in which a plurality of optical binary couplers are symmetrically connected to each other relative to the center line of the switching network and pyramids of the optical binary couplers individually associated to switching network terminals are provided, and every optical binary coupler in said pyramids is unconnected at one of its two light-conducting paths on that side which faces away from the center line of the switching network, and across the center line of the switching network, every binary coupler pyramid is connect- ed in a light-conducting manner to every binary coupler pyramid lying at the other side such that every switching network through- connect path outgoing from a switching network terminal or, respectively, leading to a switching network terminal contains an unconnected light-conducting path of an optical binary coupler when all binary couplers are in the crossed through-connect con- dition. Controllable electro-optical directional couplers can be used as the optical binary couplers. The unconnected light- conducting path can be terminated with a light absorber.

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