The optical frequency comb generator 110 may be configured to provide an optical frequency comb. An optical frequency comb is a series of discrete, nearly equally spaced, optical frequency tones. An optical frequency comb may be generated through wave modulation or stabilization of a pulse train, or other technique. The beat generator circuitry 120 may be configured to extract a beat tone from the optical frequency comb provided by the optical frequency comb generator 110. The beat tone may then be used by the error measurement and control circuitry 130. The error measurement and control circuitry 130 may be configured to receive the beat tone and a carrier envelope offset (CEO) of the optical frequency comb, determine an error based upon reference signals, and/or provide a set of control signals for actuators of the optical frequency comb generator 110. The control signals may constrain the optical frequency comb generator 110 to produce a frequency comb with a specified number of beats at a specified offset and within a specified acceptable range of error.