Optical sensor of magnetic fields
An optical magnetic field strength sensor for measuring the field strength of a magnetic field comprising a dilute magnetic semi-conductor probe having first and second ends, longitudinally positioned in the magnetic field for providing Faraday polarization rotation of light passing therethrough relative to the strength of the magnetic field. Light provided by a remote light source is propagated through an optical fiber coupler and a single optical fiber strand between the probe and the light source for providing a light path therebetween. A polarizer and an apparatus for rotating the polarization of the light is provided in the light path and a reflector is carried by the second end of the probe for reflecting the light back through the probe and thence through the polarizer to the optical coupler. A photo detector apparatus is operably connected to the optical coupler for detecting and measuring the intensity of the reflected light and comparing same to the light source intensity whereby the magnetic field strength may be calculated.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- Assignee:
- Dept. of Energy
- Patent Number(s):
- None
- Application Number:
- ON: DE87007222
- OSTI ID:
- 6707776
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
47 OTHER INSTRUMENTATION
CADMIUM
ELECTRIC DISCHARGES
ELECTROMAGNETIC PULSES
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FARADAY EFFECT
FIBERS
FUNCTION GENERATORS
HIGH-VOLTAGE PULSE GENERATORS
LIGHTNING
MAGNETIC FIELDS
MAGNETIC SEMICONDUCTORS
MAGNETOMETERS
MANGANESE
MATERIALS
MEASURING INSTRUMENTS
METALS
OPTICAL FIBERS
PHOTODETECTORS
POLARIZATION
PULSE GENERATORS
PULSES
RADIATIONS
SEMICONDUCTOR MATERIALS
SEMIMETALS
TELLURIUM
TRANSITION ELEMENTS
USES
WAVE PROPAGATION