Optical communication apparatus, control apparatus, and method for controlling optical output
AssigneeFujitsu Limited
InventorsKeisuke Harada, Taku Yoshida, Yoshiyuki Maeda
Life of this patent
Estimating the term…
Abstract
An optical communication apparatus includes an optical signal transmitter for outputting an optical signal, an optical switch device for switching a route of the optical signal, a drive controller for supplying a drive current for controlling a route switching to the optical switch device, a cooling device for cooling the optical switch device on the basis of a control signal, a temperature controller for transmitting the control signal to the cooling device in order to keep a measured temperature at a specific temperature, where the measured temperature is related to a temperature of the optical switch device.
Claims12
An optical communication apparatus comprising:
- an optical signal transmitter to output an optical signal;
- an optical switch device to perform route switching of the optical signal outputted from the optical signal transmitter;
- a drive controller to supply a drive current to the optical switch device to control the route switching performed by the optical switch device;
- a cooling device to cool the optical switch device on the basis of a control signal provided to the cooling device;
- a temperature controller to provide the control signal to the cooling device to keep a measured temperature related to a temperature of the optical switch at a predetermined temperature in accordance with feedforward control based on a drive state of the drive controller and feedback control based on the measured temperature.
A control apparatus for a communication apparatus including an optical switch device to perform route switching of an optical signal and a cooling device to cool the optical switch device, the control apparatus comprising:
- a drive controller to supply a drive current to the optical switch device to control the route switching performed by the optical switch device;
- a cooling device to cool the optical switch device on the basis of a control signal supplied to the cooling device;
- and
- a feedforward controller to supply the control signal to the cooling device to maintain a temperature of the optical switch device to a predetermined temperature according to a drive state of the drive controller.
A method for stabilizing power of an optical signal in an optical communication apparatus, the method comprising:
- supplying a drive current from a drive controller to an optical switch device to control route switching of the optical signal by the optical switch device;
- and
- applying, by a feedforward controller, a control signal to a cooling device to maintain a temperature of the optical switch device to a predetermined temperature according to a drive state of the drive controller.
Dependencies are inferred from the claim text.