Methods and apparatus for controlling a passively Q-switched laser (PQSL)
that use a Q-switched laser as a voltage controlled oscillator (VCO) in a phase-locked
loop control circuit are disclosed. The PQSL may be optically coupled to a detector.
The detector may be coupled to a an input of a phase lock loop controller. A reference
oscillator may be coupled to a reference input of the phase lock loop controller.
An output of the phase lock loop controller may be coupled to an integrator. The
integrator may be coupled to a means for controlling an amount of power provided
to the PQSL.
