Dual-tap electro-optic modulator auto-bias control
AssigneeInternational Business Machines Corporation
InventorsDouglas M. Gill, Jonathan E. Proesel
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Abstract
A method and apparatus for controlling operation of an electro-optic modulator is disclosed. A first intensity of light is obtained at an input to the electro-optic modulator. A second intensity of light is obtained at an output of the electro-optic modulator. A difference between the obtained first intensity and the obtained second intensity is used to control a biasing of a modulator transfer function of the electro-optic modulator to control the electro-optic modulator.
Claims20
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An apparatus for controlling operation of an electro-optic modulator, comprising:
- a first optical tap configured to tap input light that is input to the electro-optic modulator;
- a second optical tap configured to tap output light that is output from the electro-optic modulator;
- and
- a circuit configured to generate a control signal based on a difference between an intensity of the input light and an intensity of the output light to control a bias point of operation on a modulator transfer function of the electro-optic modulator to control the operation of the electro-optic modulator.
Dependencies are inferred from the claim text.