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Fiber-optic voltage sensor with cladded fiber and evanescent wave variation detection

Patent ·
OSTI ID:868595
 [1]
  1. Lakewood, CO
+ Show Author Affiliations
A fiber optic voltage sensor is described which includes a source of light, a reference fiber for receiving a known percentage of the light and an electrostrictive element having terminals across which is applied, a voltage to be measured. The electrostrictive element is responsive to the applied voltage to assume an altered physical state. A measuring fiber also receives a known percentage of light from the light source and is secured about the electrostrictive element. The measuring fiber is provided with a cladding and exhibits an evanescent wave in the cladding. The measuring fiber has a known length which is altered when the electrostrictive element assumes its altered physical state. A differential sensor is provided which senses the intensity of light in both the reference fiber and the measuring fiber and provides an output indicative of the difference between the intensities.
Research Organization:
Rockwell International Corp
DOE Contract Number:
AC04-76DP03533
Assignee:
United States of America as represented by United States Department (Washington, DC)
Patent Number(s):
US 5171981
OSTI ID:
868595
Country of Publication:
United States
Language:
English

References (2)

All Single Mode Fiber Magnetic Field Sensor conference January 1986
An Overview Of Mach-Zehnder Interferometric Sensors conference January 1986

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