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    • 7. 发明授权
    • Optical integrated voltage sensor for optically measuring the magnitude
of a voltage
    • 用于光学测量电压大小的光学集成电压传感器
    • US5969341A
    • 1999-10-19
    • US949006
    • 1997-10-10
    • Hiroshi ItoTadashi IchikawaSatoru Kato
    • Hiroshi ItoTadashi IchikawaSatoru Kato
    • G01R29/08G01R1/07G01R13/34G02B5/14
    • G01R1/071G01R13/347
    • A compact voltage sensor with stable characteristics is provided. A measuring beam that is incident from an optical fiber is branched into first and second modulation-inducing waveguides of a wave branching/combining section within an optical integrated circuit. Phase changes of opposite sign are induced in the measuring beams propagating within the first and second modulation waveguides by applying voltages of mutually opposite sign to modulation-inducing electrodes, to induce a phase difference between the two. By reflecting the measuring beams from a reflective surface, propagating them back in the opposite direction within the first and second modulation waveguides, and passing them through the optical intensity modulation section again, thus applying a further phase modulation thereto, the phase difference between the measuring beams proceeding in the opposite direction within the first and second modulation waveguides can be made to be substantially twice the phase difference of the measuring beams before they are reflected by the reflective surface. The sensor also has a function to protect a sensor section thereof from dielectric breakdown caused by the accidental input of a high voltage.
    • 提供具有稳定特性的紧凑型电压传感器。 从光纤入射的测量光束被分支到光集成电路内的波分支/合成部分的第一和第二调制诱导波导。 通过向调制诱导电极施加相互相反的电压的电压,在第一和第二调制波导中传播的测量光束中引起相反符号的相位变化,以引起两者之间的相位差。 通过从反射表面反射测量光束,在第一和第二调制波导内沿相反方向传播它们,并再次通过光强度调制部分,从而对其进行相位调制,测量之间的相位差 在第一调制波导和第二调制波导之间沿相反方向前进的光束在被反射表面反射之前可以大致是测量光束的相位差的两倍。 传感器还具有保护其传感器部分免受高电压意外输入引起的电介质击穿的功能。