Patent ID: 11881898
Assignee: INFINERA CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A receiver, comprising:
a plurality of photodiodes operable to receive at least a portion of a modulated optical signal including a first optical subcarrier having a first frequency, a second optical subcarrier having a second frequency, and a third optical subcarrier having a third frequency, the second optical subcarrier carrying clock information, such that the second frequency of the second optical subcarrier, which carries the clock information, is greater than the first frequency of the first optical subcarrier and less than the third frequency of the third subcarrier, only the second optical subcarrier carrying the clock information;
analog-to-digital converter circuitry operable to receive analog signals indicative of outputs from the photodiodes, the analog-to-digital converters circuitry outputting digital samples;
a digital signal processor including a plurality of filters operable to receive the digital samples; and
a clock recovery circuit operable to provide a clock signal based on the digital samples, the digital signal processor being operable to output data based on the clock signal.