Electric field sensor having sensor head with unbalanced electri

Details Electric field sensor having sensor head with unbalanced electri Electric field sensor having sensor head with unbalanced electri

1996-12-24

1998-12-15

Ballato, Josie

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324752, G01R 3100

Patent

active

058501401

ABSTRACT:
An electric field sensor comprises a substrate 4, an incident optical waveguide 5 formed on the substrate 4, two branched optical waveguides 6 formed on the substrate 4 to be branched from the incident optical waveguide 5 and having refractive indexes, which are variable in response to an electric field intensity applied thereto, an outgoing optical waveguide 7 formed on the substrate 4 to join the branched optical waveguides 6, and an electric field shielding member 8 formed in the vicinity of a part of the branched optical waveguides 6 for shielding an electric field. The substrate 4 may be provided with a reflection mirror 16 for reflecting light beams from the branched optical waveguides 6. The substrate 4 is made of a ferroelectric material and has polarization directions reverse to each other at portions where the two branched optical waveguides 6 are formed.

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Patent Abstracts of Japan, vol. 18, No. 48 (P-1682), Jan. 25, 1994 & JP-A-05 273260 (Yokogawa Electric).

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