Patent ID: 6925221

Claim:
An optical switch comprising: a first plurality of ports comprising signal input ports and reference input ports; a second plurality of ports comprising signal output ports and reference output ports; a first plurality of mirrors disposed on a first surface; a second plurality of mirrors disposed on a second surface; wherein each one of the first plurality of mirrors is individually controllable to direct light incident from a corresponding one of the first plurality of ports to any one of the second plurality of mirrors, and wherein each one of the second plurality of mirrors is individually controllable to direct to a corresponding one of the second plurality of ports, light incident from any one of the first plurality of mirrors; a reference light source coupled to provide reference light to the reference input ports; a reference detector coupled to the reference output ports; wherein measured changes in optimal positions of mirrors in the first plurality of mirrors and of mirrors in the second plurality of mirrors for directing reference light from reference input ports to reference output ports can be used to determine changes in optimal positions of mirrors in the first plurality of mirrors and of mirrors in the second plurality of mirrors for directing signal light from signal input ports to signal output ports; and a look-up table associated with the first plurality of mirrors, the look-up table including data describing an optimal position of each mirror of the first plurality of mirrors to connect signal light between any signal input port and any signal output port.