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    • 1. 发明授权
    • ELECTRIC FIELD SENSOR
    • 电场传感器
    • EP0668507B1
    • 2002-10-09
    • EP94919863.4
    • 1994-07-07
    • NEC TOKIN Corporation
    • TOKANO, YuichiKONDO, Michikazu
    • G01R15/24G01R29/08
    • G01R15/241G01R29/0885
    • An electric field sensor comprising an input optical, an incoming waveguide (5) formed on a substrate (4), two branched waveguides (6) branched from the waveguide (5) on the substrate (4) and having refractive indexes variable depending upon the intensity of the applied electric field; an output wave guide (7) joined with the waveguides (6) on the substrate (4); and a shield member (8) provided near the guides (6) to shield part of the waveguide (6) from electric fields. A reflecting mirror (16) may be formed on the substrate (4) so as to reflect light from the guides (6). The substrate (4) may be formed of a ferroelectric substance, in which the respective regions of the two waveguides (6) are polarized in opposite directions.
    • 一种电场传感器,包括输入光学部件,形成在衬底(4)上的输入波导(5),在衬底(4)上从波导(5)分支出来的两个分支波导(6),其折射率根据 施加电场的强度; 在基板(4)上与波导(6)结合的输出波导(7); 以及靠近导轨(6)设置的屏蔽部件(8),以遮蔽波导(6)的一部分免受电场影响。 可以在基板(4)上形成反射镜(16)以反射来自导轨(6)的光。 衬底(4)可以由铁电物质形成,其中两个波导(6)的各个区域在相反的方向上被极化。