Nidium: Yttrium Aluminum Garnet (Nd: YAG) Crystals for Second Harmonic Oscillator (SHG)

摘要

The present invention relates to the determination of Nd: YAG used as a gain material in a second harmonic oscillator (SHG: Second Harmonic Generation), and more particularly, to Nd used in a second harmonic transmitter used in an A / V recording and reproducing system. : Both sides of YAG crystal are coated with anti-reflective property to fundamental wave and high transmissive property to semiconductor diode wavelength and second harmonic so that it can be used as high-density magneto-optical recording device. Nd is used: YAG crystal is an anti-reflection film in this case is not in accordance with the present invention it is of about 8% beam which is reflected at the interface between Nd: according to Sikkim coating a dielectric thin film of SiO ₂ and ZrO ₂ on both surfaces of the YAG crystal semiconductor diode Figure By minimizing the loss of the beam irradiated from the beam, the maximum output after excitation is possible in the crystal, and exhibits an anti-reflective effect on the fundamental wave, as well as the second harmonic and Conductor diode also can be a high transmission film serves also to a useful beam to the high-output second harmonic oscillator manufacture.