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US 12,308,602 B1Granted
Tunable laser
AssigneeAcacia Communications, Inc.
InventorsXue Huang, Christopher Doerr
Life of this patent
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Abstract
A method, apparatus, and system for adjusting the phase noise of a laser.
Claims19
A method for adjusting the phase noise of a laser, the method comprising:
- receiving an output of a rejection photodetector optically connected to a waveguide;
- determining a difference between the output of the rejection photodetector and a target value;
- and
- using a control loop comprising an integrator to drive a phase shifter to adjust the difference between the output of the rejection photodetector and the target value to zero.
1 more element
A method for adjusting the phase noise of a laser, the method comprising:
- receiving a first output of a first rejection photodetector optically connected to a first waveguide;
- determining a first difference between the first output of the first rejection photodetector and a first target value;
- using a control loop to drive a first phase shifter to adjust the first difference between the first output of the first rejection photodetector and the first target value to a first value greater than zero;
- receiving a second output of a second rejection photodetector optically connected to a second waveguide;
- determining a second difference between the second output of the second rejection photodetector and a second target value;
- and
- using the control loop to drive a second phase shifter to adjust the second difference between the second output of the second rejection photodetector and the second target value to a second value greater than zero.
4 more elements
Dependencies are inferred from the claim text.