Binary tree switching network

Details Binary tree switching network Binary tree switching network

H - Electricity

04

Q

344/28

H04Q 3/52 (2006.01) G02F 1/31 (2006.01) G06F 11/10 (2006.01)

Patent

CA 1328007

- 11 - ABSTRACT (Ref Fig 3) BINARY TREE SWITCHING NETWORK A binary tree switching network in which the switching stages (a-e) are configured to switch an input signal (A - D) from a selected input to an output (o) by means of a control code set having a minimum Hamming distance, d, greater than 1 which eliminates cross-talk of order d-1 and less. Such a network may be used for switching optical signals by means of optical beam deflector stages each comprising a variable polarisation rotator and a polarisation sensitive deflector. Elimination of 1st order cross talk is readily achieved by means of a modification stage arranged to receive a single input from the preceding stages and to pass it to the output.

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