Arbitrary grid wavelocking using digitally generated out-of-band tones

A system comprising,

• an optical transmitter;
• a detector;
• an optical filter;
• and
• a controller configured to:
• identify a data channel for alignment to an expected wavelength range,
• instruct the optical transmitter to insert a first tone at a first frequency lower than a lower frequency edge for the data channel and a second tone at a second frequency greater than an upper frequency edge for the data channel into an optical signal associated with the data channel;
• compare an observed response to the first tone and the second tone to a set of desired responses to determine whether the optical transmitter is operating at a desired frequency associated with the expected wavelength range,
• the observed response to the first tone and the second tone being generated based on the optical signal being attenuated by the optical filter;
• and
• selectively control the optical transmitter to align an observed wavelength range associated with the data channel to the expected wavelength range based on determining whether the optical transmitter is operating at the desired frequency.

A method, comprising:

• inserting, by a device, a set of tones into a transmitter signal at a set of frequency offsets from a set of transmitter channels associated with a set of transmitter channel wavelengths,
• the set of transmitter channels including a first channel being associated with a first quantity of bandwidth and a second channel associated with a second quantity of bandwidth,
• the first quantity of bandwidth being different from the second quantity of bandwidth;
• and
• repeatedly adjusting, by the device, the transmitter signal to align the set of transmitter channel wavelengths based on a set of observed responses to the set of tones, generated based on the transmitter signal passing through an optical filter, failing to match a set of expected responses.