Patent ID: 7349451
Filing Date: 2008-03-25
Classification: B23K,G02F,H01S

Abstract:
1. A harmonic pulse laser apparatus comprising: an optical resonator having an end mirror and a harmonic separator output mirror disposed optically opposed to each other; an active medium disposed on a light path of the optical resonator nearer to the end mirror than to the harmonic separator output mirror; an excitation unit for optically pumping the active medium so as to generate a fundamental wave pulse laser beam with a fundamental frequency that has a pulse width of 100 μs or longer; a KTP crystal disposed on the light path of the optical resonator nearer to the harmonic separator output mirror than to the end mirror so as to generate a second harmonic pulse laser beam having a frequency that is two (2) times the frequency of the fundamental wave pulse laser beam; and a harmonic mirror for allowing the fundamental wave pulse laser to be transmitted therethrough and for reflecting the second harmonic pulse laser beam, the harmonic mirror being disposed between the active medium and the KTP crystal, wherein the harmonic separator output mirror confines the fundamental wave pulse laser beam on the light path of the optical resonator and delivers the second harmonic pulse laser beam to the outside of the light path of the optical resonator.