High-contrast Patt laser device and control method thereof

The invention discloses a high-contrast Patt laser device and a control method thereof. The first cavity mirror of the oscillator is installed on the mirror bracket through the first piezoelectric ceramic, the second cavity mirror is installed on the mirror bracket through the second piezoelectric ceramic, and for long-time locking of the laser cavity length, the long-time cavity length drift of the laser cavity length exceeds the piezoelectric ceramic measuring range; the second piezoelectric ceramic can synchronize the time of the pump pulse and the seed pulse in the crystal of the parametric amplifier with high precision, the stepping motor can solve the problem of long-time drift of the pump pulse and the seed pulse, and when the expansion and contraction amount of the second piezoelectric ceramic exceeds the limit of the second piezoelectric ceramic, a large time delay is introduced through movement of the stepping motor, so that the time delay of the pump pulse and the seed pulse is reduced. The voltage