Optical switch controller and movable body controller

Abstract

In an optical switch controller, in order that residual vibration at movement control of a movable body such as a tilt mirror can be reduced and controlled with high accuracy, a processing unit outputs a driving signal for controlling the angle of the tilt mirror, the driving signal is D / A converted by a D / A converter and then is changed to a high-voltage signal by a high-voltage amplifier to be supplied to the tilt mirror, the electrostatic capacity of the tilt mirror changes corresponding to angle change of the tilt mirror, a mirror-angle detecting unit detects the electrostatic capacity and feeds back it as a correction value to a processing unit, and the processing unit corrects the driving signal using a correction value obtained when the angle of the tilt mirror is actually changed.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a controller for controlling the movement of a movable body such as a mirror of an optical switch composed of a tilt mirror for which a MEMS technique is used; and more particularly to an optical switch controller and a movable body controller capable of reducing residual vibration at movement control of the movable body and performing the movement control accurately. [0003] 2. Description of Related Art Recently, traffic has been significantly increasing with rapid spread of the Internet. A wavelength division multiplexing (WDM) system is available as a system to construct a large capacity optical communication network dealing with the increase of traffic. A basic optical network constructed with a WDM system is provided with an optical cross-connect (OXC) system and an optical add / drop module (optical add / drop multiplexer (OADM)). An optical node constituted by an optical cross-con...

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