Nonintrusive electro-optic field sensor

Details Nonintrusive electro-optic field sensor Nonintrusive electro-optic field sensor

1990-08-17

1991-08-20

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324158R, 356352, G01R 3100, H01S 310

Patent

active

050417797

ABSTRACT:
Utilizing the property of electro-optic crystal which changes its index of refraction in the presence of electric field, such a crystal is placed inside the resonant cavity of a Fabry-Perot type interferometer. Laser light travelling through the cavity and the crystal experiences modified optical path length in the presence of electric field. The fringe pattern at the focal plane is observed and used to detect and measure the ambient electric field.

REFERENCES:
patent: 4196396 (1980-04-01), Smith
patent: 4221472 (1980-09-01), Smith et al.
patent: 4910454 (1990-03-01), Williamson
Valkenburg et al., "A High Q Fabry Perot Interferometer for Water Vapor Arption Measurments in the 100 Gc/S to 300 Gc/S Frequency Range".

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