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    • 29. 发明授权
    • Second harmonic generator and method of fabrication thereof
    • 二次谐波发生器及其制造方法
    • US5274727A
    • 1993-12-28
    • US879361
    • 1992-05-07
    • Kenchi ItoKazumi KawamotoHiroshi MomijiYasuo HiraHidemi SatoAtsuko Fukushima
    • Kenchi ItoKazumi KawamotoHiroshi MomijiYasuo HiraHidemi SatoAtsuko Fukushima
    • G02F1/377G02F1/37
    • G02F1/3775
    • A second harmonic generator having a wide acceptance of bandwidth of temperature and/or a high conversion efficiency and a method of fabrication thereof are disclosed. An equidistant arrangement of pole-inverted grating having a rectangular sectional profile and the direction of spontaneous polarization opposite to that of a substrate within an optical waveguide has been known to produce a high conversion efficiency of the second harmonic generator A second harmonic generator having such a structure, which has so far been impossible to fabricate, is formed utilizing the liquid-phase epitaxial method and the ion-implanting method. Further, the substrate and the optical waveguide are formed of the same type of material. The temperature coefficient of the refractive index in the direction perpendicular to the substrate surface is rendered substantially equal to that of the optical waveguide, thereby improving the acceptance of bandwidth of temperature and making possible practical applications of the second harmonic generator.
    • 公开了具有对温度带宽的广泛接受和/或高转换效率的二次谐波发生器及其制造方法。 已知具有矩形截面轮廓和与光波导内的衬底相反的自发极化方向的等反转光栅的等距布置产生二次谐波发生器A的高转换效率二次谐波发生器具有这样的 使用液相外延法和离子注入法形成迄今为止不可能制造的结构。 此外,基板和光波导由相同类型的材料形成。 使与基板表面垂直的方向的折射率的温度系数基本上等于光波导的温度系数,从而提高了温度带宽的接受性,并且可以实现二次谐波发生器的实际应用。