A Spherical Electro Optic High Voltage Sensor
Abstract
A spherical electro-optic (EO) crystal is introduced for photonic measurement of pulsed high-voltage fields. A spherical shape is used in order to reduce electric field gradients in the vicinity of the sensor. The sensor is pure dielectric and is interrogated remotely using a laser. The sensor does not require the connection of any conducting components, which results in the highest electrical isolation. The spherical nature of the crystal coupled with the incident laser beam, and crossed polarizers (intensity modulation scheme). automatically produces interference figures. The fringes move with the application of an electric field applied to the EO crystal, and a photodetector senses the pattern movement. The sensor can be made small (e.g. < 3mm diam.) resulting in a large AC bandwidth, (e.g. > 4 GHz). Proof of principle results are presented for the use of a solid sphere (-3 mm diam.) of LiNb03 for measuring pulsed electric and voltage fields.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1989
- Accession Number
- ADA639148
Entities
People
- C. V. Smith Jr.
- M. C. Mckinley
- Robert Magnusson
- T. D. Black
- W. C. Nunnally
Organizations
- University of Texas at Arlington