Laser cavity repetition rate tuning and high-bandwidth stabilization

A method of adjusting an output optical coupler for a pulsed laser, the method comprising:

• detecting a change in a frequency comb spectrum of the pulsed laser with respect to a trapped ion qubit, wherein the pulsed laser produces optical beams that drive transitions in the trapped ion qubit for quantum information processing, the efficiency of the transitions being based on spacing of comb lines in the frequency comb spectrum;
• generating a control signal based on the detected change;
• providing the control signal to the output optical coupler, the output optical coupler having:
• a locking assembly with a cavity output coupler mirror and a piezoelectric actuator inside, and
• one or more components coupled to the locking assembly;
• and
• adjusting, based on the control signal, one or more positional degrees of freedom of the locking assembly using the one or more components to change an optical path within a laser cavity used to generate the pulsed laser, the adjusting enables tuning of the frequency comb spectrum of the pulsed laser, and
• providing, by the locking assembly, high-bandwidth stabilization by mechanically decoupling the piezoelectric actuator and the cavity output coupler mirror from environmental vibrations in the pulsed laser.