Patent ID: 6421362
Filing Date: 2002-07-16
Classification: H01S,H02J

Abstract:
A charging and discharging circuit for a pulse laser comprising:a high-voltage power supply for charging a capacitor with electric charges until an interpolar voltage VC of the capacitor reaches a final target value VF; a discharging circuit for discharging the electric charges in pulses between discharge electrodes to excite a laser medium and oscillating a pulse laser beam; a pulse monitor for detecting a pulse light emission amount per pulse of the pulse laser beam; and a laser controller for calculating a final target value VF of an interpolar voltage VC for the next charging of the capacitor on the basis of the pulse light emission amount after the laser oscillation and outputting the value to the high-voltage power supply, wherein said laser controller is set to control in a manner such that said high-voltage power supply starts charging said capacitor with electric charges toward a predetermined primary target value V1 before said laser controller calculates the final target value VF of the interpolar voltage VC of said capacitor, and the charging is performed up to the calculated final target value VF after the final target value is calculated.