Most of the saturable absorbers commonly used to perform mode locking in laser cavities
affect the trigger conditions of laser oscillation, which requires manually forcing the laser
start-up by various means such as polarization controllers. We present a procedure for
designing a laser cavity driven by a nonlinear optical loop mirror, which allows the laser to
operate optimally without interfering with the oscillation triggering conditions, thus opening
up possibilities for integration of this type of laser.