Systems and methods for dual-band modulation and injection-locking for coherent PON

A receiver for a communication network, comprising:

• an input portion operably coupled to a signal transport medium of the communication network, the input portion configured to receive, from a remote parent source in communication with the signal transport medium, a coherent multi-band signal including (i) a first side band portion centered at a first frequency, (ii) a second side band portion centered at a second frequency higher than the first frequency, and (iii) a target carrier signal centered at a third frequency different than the first and second frequencies;
• a first local child signal source;
• a local injection site configured to inject the received target carrier signal into the first local child signal source;
• a filter disposed between the local injection site and the first local child signal source, the filter configured to filter the target carrier signal from the coherent multi-band signal such that the first local child signal source is injection locked to the third frequency;
• and
• a first downstream coherent receiving unit,
• wherein the first local child signal source is disposed between the local injection site and the first downstream coherent receiving unit.