WDM channel reassignment

A method, comprising:

• receiving an optical receiver that includes:
• a plurality of light sources,
• a first waveguide configured to receive light signals from the plurality of light sources,
• a plurality of ring resonators disposed adjacent the first waveguide,
• a plurality of heaters coupled to the plurality of ring resonators, respectively,
• a plurality of heater controllers configured to control the plurality of heaters, respectively,
• a second waveguide coupled to the plurality of ring resonators,
• a plurality of transimpedance amplifiers providing output to the plurality of heater controller, and
• an assignment controller configured to control the plurality of light sources and the plurality of heater controllers;
• configuring the plurality of light sources to emit light at a wavelength;
• causing the plurality of heater controllers to increase electric current to the plurality of heaters;
• checking, by using the assignment controller, to see if any of the plurality of ring resonators resonate;
• when one of the plurality of ring resonators resonates as a resonating ring resonator, assigning the resonating ring resonator with the wavelength;
• and
• when none of the plurality of ring resonators resonates, causing the plurality of heater controllers to further increase electric current to the plurality of heaters.

A system comprising:

• an optical receiver, wherein the optical receiver includes a first waveguide, multiple ring resonators (RRs) disposed adjacent to the first waveguide, and multiple heaters coupled to the RRs in one-to-one correspondence;
• multiple heater controllers coupled to the multiple heaters in one-to-one correspondence;
• and
• an assignment controller that is configured to perform:
• coupling a light source to the first waveguide;
• instructing the heater controllers to increase electric current through the heaters until one of the RRs resonates, wherein the one of the RRs is coupled to one of the heaters;
• and
• assigning the one of the RRs to a wavelength of the light source.