Patent ID: 11956341
Assignee: APPLE INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electro-optical phase-locked loop comprising:
a first light source configured to emit light at a first frequency;
a second light source configured to emit light at a second frequency that is offset from the first frequency by an offset frequency of at least 50 GHz;
a feedback path that communicably couples an output of the second light source to an input of the second light source;
a digital-to-time converter (DTC) configured to generate a reference signal;
a phase comparator disposed along the feedback path, wherein the phase comparator is configured to adjust the second light source based at least in part on the reference signal; and
a photodiode having an output coupled to an input of the phase comparator.