Patent ID: 6278812
Filing Date: 2001-08-21
Classification: G02B

Abstract:
A method for performing protection in a free-space micro-machined optical switching fabric, wherein the switching fabric receives a plurality of inputs (M), and provides a plurality of outputs (N), comprising a matrix of micromachined free-rotating mirrors arranged in a plurality of (N) parallel rows and (M) columns wherein each of the plurality of mirrors is in either one of an actuated or non-actuated state comprising the steps of:detecting a failed mirror, wherein the failed mirror is associated with a transmission path between an input and an output;determining a transmission path between the input and the output, wherein the transmission path includes a backside of a pivot mirror that is in an actuated state;actuating at least one mirror, to establish the transmission path between the input and the output that includes the backside of the pivot mirror.