Patent ID: 8761214
Filing Date: 2014-06-24
Classification: G02B,G02F,H01S

Abstract:
1. An apparatus for stabilizing second harmonic wave pulse output in a laser system operating by pulses, the apparatus comprising: a pulse laser oscillator for outputting a first laser pulse; non-linear crystals for converting the first laser pulse having a first wavelength into a second laser pulse having a second wavelength being half the first wavelength and outputting the second laser pulse; a light absorption filter for absorbing energy of the second laser pulse and outputting a third laser pulse having an energy lower than the second laser pulse; moving means for moving the light absorption filter away from a laser path and selectively placing the light absorption filter on the laser path; and a control unit for controlling the moving means to adjust the energy of the second laser pulse according to a selected energy mode, wherein the control unit comprises: