Modulation current compensation of laser for controlled extinction ratio using dither signal
OwnerBongsin Kwarkinventor
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Abstract
A method of controlling an optical device includes inputting a dither current to the optical device, calculating a ratio of a first slope of a first characteristic curve to a second slope of a second characteristic curve, and calculating a modulation current based on the ratio. An apparatus for controlling an optical device includes a driver, which inputs a dither current. The apparatus also includes a controller. The controller calculates a first slope of a first characteristic curve, a second slope of a second characteristic curve, and a modulation current.
Claims19
A method of controller an optical device, the method comprising:
- introducing a dither current to the optical device;
- calculating a ratio of a first slope of a characteristic curve to a second slope of a second characteristic curve;
- and
- calculating a modulation current based on said ratio.
An apparatus for controlling an optical device, comprising:
- a driver which inputs a dither current to the optical device;
- and
- a controller, which calculates a first slope of a first characteristic curve, a second slope of a second characteristic curve, and which calculates a modulation current.
Dependencies are inferred from the claim text.