Transparent optical communications switch

Details Transparent optical communications switch Transparent optical communications switch

1998-03-04

2000-10-03

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359123, 359128, 359140, H04J 1400

Patent

active

061281131

ABSTRACT:
A communications switch that connects together multiple communicating nodes such that optical signals flow transparently through the switch. Each node is connected to the switch by an optical cable containing input and output optical fibers, with each fiber containing optical signals at multiple wavelengths. For each multi-fiber cable, an optical beam is formed containing the input signals from that cable. Within each beam, the different input signals are spatially adjacent to each other. The signals within a particular beam are spatially gated to form multiple beam segments. Each of these beam segments is spatially shifted to a different output, where it is combined with beam segments obtained from the inputs from other cables. Signals from multiple beam segments are concentrated onto the output fibers of each multi-fiber cable. With this approach, the beams flow along optically transparent paths through the switch, and the characteristics of the optical signals are unaltered as the signals flow through the switch.

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