Apparatus for and method of controlling optical interferometer
AssigneeElectronics and Telecommunications Research Institute
InventorsYoun Jang, Kwangjoon Kim
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Abstract
An apparatus and method for controlling an optical interferometer are provided. The method includes setting a thermoelectric cooler (TEC) temperature of the optical interferometer to a room temperature, obtaining an optimal temperature using a difference between two output powers of the optical interferometer based on eye opening of the two output powers and applying an optimal heat voltage generating the optimal temperature to a delay adjuster of the optical interferometer, and performing dithering at the optimal temperature to stabilize the optimal heat voltage.
Claims9
A method of controlling an optical interferometer, comprising:
- (a) setting a thermoelectric cooler (TEC) temperature of the optical interferometer to a room temperature;
- (b) obtaining an optimal temperature using a difference between two output powers of the optical interferometer based on eye opening of the two output powers and applying an optimal heat voltage generating the optimal temperature to a delay adjuster of the optical interferometer;
- and
- (c) performing dithering at the optimal temperature to stabilize the optimal heat voltage.
An apparatus for controlling an optical interferometer, comprising:
- an optical interferometer receiving a differential phase shift keying (DPSK) optical signal and generating a first output and a second output which is a complement of the first output;
- a delay unit controlling delay time of the second output;
- a photoelectric converter converting the first output and the second output into electrical signals and outputting a first signal and a second signal;
- and
- a control unit receiving the first signal and the second signal and generating a heat voltage for driving the delay unit based on a relationship between the first signal and the second signal.
Dependencies are inferred from the claim text.