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US 10,714,894 B1Granted
Carrier sweep-out in a tunable laser
AssigneeAcacia Communications, Inc.
InventorsChristopher Doerr, Li Chen, Long Chen
Life of this patent
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Abstract
In a first embodiment, an external cavity tunable laser, comprising a silicon photonics circuit comprising one or more resonators having one or more p-i-n junctions; wherein a voltage is applied to one or more of the p-i-n junctions. In a second embodiment, a method of operating an external cavity tunable laser, comprising sweeping out free-carriers from a resonator of the tunable laser by applying a voltage to a p-i-n junction of a waveguide of the resonator.
Claims15
An external cavity tunable laser, comprising:
- a silicon photonics circuit comprising one or more ring resonators having one or more p-i-n junctions;
- wherein a voltage is applied to one or more of the p-i-n junctions;
- wherein a reverse junction current is used to control power of the external cavity tunable laser using a control loop;
- wherein the reverse junction current serves as a feedback signal to enable the control loop to lock at least a ring resonator of the one or more ring resonators at a lasing wavelength.
1 more element
A method of operating an external cavity tunable laser, comprising:
- sweeping out free-carriers from a ring resonator of the tunable laser by applying a voltage to a p-i-n junction of a waveguide of the ring resonator;
- and
- using a reverse junction current as an input to a control loop to control power of the external cavity tunable laser;
- wherein the reverse junction current serves as a feedback signal to enable the control loop to lock at least a ring resonator of the one or more ring resonators at a lasing wavelength.
1 more element
A system comprising:
- an external cavity tunable laser;
- and
- a silicon photonics circuit comprising one or more ring resonators having one or more p-i-n junctions;
- wherein a voltage is applied to one or more of the p-i-n junctions;
- using a reverse junction current to control power of the external cavity tunable laser using a control loop;
- wherein the control loop stabilizes laser temperature;
- wherein the reverse junction current serves as a feedback signal to enable the control loop to lock at least a ring resonator of the one or more ring resonators at a lasing wavelength.
4 more elements
Dependencies are inferred from the claim text.