Patent ID: 8149490
Filing Date: 2012-04-03
Classification: G02B,Y10S

Abstract:
1. An optical switch comprising: at least one input port which inputs input light; at least one output port which outputs output light; at least one minor device which includes a mirror pivotally supported with respect to an x-axis and a y-axis perpendicular to the x-axis, and electrodes facing the mirror, said mirror device applying driving voltages corresponding to manipulated variables to the electrodes to tilt the mirror, thereby deflecting the input light input to said input port and making the input light selectively enter an arbitrary one of said at least one output port; a setting unit which sets, on a plane having coordinate axes represented by a manipulated variable V a perturbation unit which perturbs the mirror by applying voltages to the electrodes based on the perturbation pattern; a detection unit which detects an intensity of output light which is input light input to one input port and output from one output port upon the perturbation of the mirror; and an error calculation/correction unit which calculates manipulated variables to obtain a tilt angle of the mirror corresponding to connection of said one input port and said one output port using a radius of the circular trajectory and a phase difference angle calculated based on an output light intensity waveform upon the perturbation of the mirror and perturbation waveforms used to draw the circular trajectory.