Wavelength locking and power control systems for multi-channel photonic integrated circuits (PICS)

A photonic integrated circuit comprising:

• a plurality of signal channels provided on a substrate, each of the plurality of signal channels comprising:
• a modulated source providing a corresponding one of a plurality of first modulated optical signals, each of the plurality of first modulated optical signals having a corresponding one of a plurality of predetermined emission wavelengths at a corresponding one of a plurality of predetermined optical powers;
• and
• an active element configured to receive a corresponding one of the plurality of first modulated optical signals and a respective one of a plurality of tone frequencies, the active element superimposing the respective one of the plurality of tone frequencies on the corresponding one of the plurality of first modulated optical signals to form a corresponding one of a plurality of second modulated optical signals,
• wherein the plurality of tone frequencies are employed to determine a corresponding one of a plurality of emission wavelength offset values relative the predetermined one of the plurality of emission wavelengths and a corresponding one of a plurality of optical power offset values relative the predetermined one of the plurality of optical powers for a corresponding one of the plurality of first modulated optical signals.