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US 7,248,759 B2Granted
Optical signal switching apparatus, and controller and method for control of optical switch
AssigneeFujitsu Limited
InventorAtsuo Ishizuka
Life of this patent
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AssigneeFujitsu Limited
InventorAtsuo Ishizuka
Estimating the term…
In controlling an optical switch that includes an incoming light deflection section to deflect incoming light from a predetermined input port in an arbitrary direction, and an outgoing light deflection section to deflect outgoing light from the incoming light deflection section in an arbitrary direction and couple the outgoing light to a predetermined output port, a monitoring section monitors optical coupling efficiency of the outgoing light into the output port and controller controls deflection characteristics of the deflection sections so that the monitored optical coupling efficiency is maximized. Therefore, even when optimal controlled variables for the optical switch are displaced due to temperature drift and/or drift over time, the time taken to find the optimal controlled variables can be significantly reduced and rapid switching of optical paths can be achieved.
An optical signal switching apparatus comprising:
A controller for control of an optical switch, which includes incoming light deflection means to deflect incoming light from a predetermined input port in an arbitrary direction, and outgoing light deflection means to deflect outgoing light from said incoming light deflection means in an arbitrary direction and couple the outgoing light to a predetermined output port, comprising:
A method for control of an optical switch, which includes an incoming light deflector to deflect incoming light from a predetermined input port in an arbitrary direction, and an outgoing light deflector to deflect outgoing light from said incoming light deflector in an arbitrary direction, and couple the outgoing light to a predetermined output port, the method comprising:
Dependencies are inferred from the claim text.