Planar array optical switch and method

Abstract

An optical switch device includes a first array () of reflectors (), each associated with a separate optical fiber input (), and a second array () of reflectors (), each associated with a separate fiber output (). The reflectors (and) are positionable to direct an optical signal from any one of the fiber inputs () to any one of the fiber outputs (). The optical signal is directed along an optical pathway between the desired fiber output () and its associated reflector that is substantially aligned with an axis extending centrally from the fiber output. Preferably, symmetrical fiber beam forming units for forming the optical signal into a focused beam are included between the fiber inputs () and the first array as well as between the second array () and the fiber outputs (). A method for switching optical signals between an input and an output optical fiber end involves forming the optical signal emitted from the input fiber end into a focused beam wherein rays from a point on the input fiber end are convergent. The focused beam is directed towards the output fiber end using at least two positionable reflectors oriented to direct the signal so that, prior to reaching the fiber output, it propagates along an optical pathway that is substantially aligned with an axis extending centrally from the output fiber end.