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Title: Semiconductor sensor for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets

Abstract

Described are the design of a rare earth iron garnet sensor element, optical methods of interrogating the sensor element, methods of coupling the optical sensor element to a waveguide, and an optical and electrical processing system for monitoring the polarization rotation of a linearly polarized wavefront undergoing external modulation due to magnetic field or electrical current fluctuation. The sensor element uses the Faraday effect, an intrinsic property of certain rare-earth iron garnet materials, to rotate the polarization state of light in the presence of a magnetic field. The sensor element may be coated with a thin-film mirror to effectively double the optical path length, providing twice the sensitivity for a given field strength or temperature change. A semiconductor sensor system using a rare earth iron garnet sensor element is described.

Inventors:
 [1]
  1. 8544 Electric Ave., Vienna, VA 22182
Issue Date:
Research Org.:
Airak, Inc. (US)
OSTI Identifier:
874673
Patent Number(s):
6437885
Assignee:
Duncan; Paul G. (8544 Electric Ave., Vienna, VA 22182)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
DOE Contract Number:  
FG02-99ER86100
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
semiconductor; sensor; optically; measuring; polarization; rotation; optical; wavefronts; rare; earth; iron; garnets; described; design; garnet; element; methods; interrogating; coupling; waveguide; electrical; processing; monitoring; linearly; polarized; wavefront; undergoing; external; modulation; due; magnetic; field; current; fluctuation; faraday; effect; intrinsic; property; rare-earth; materials; rotate; light; presence; coated; thin-film; mirror; effectively; double; path; length; providing; twice; sensitivity; strength; temperature; change; magnetic field; rare earth; electrical current; optical path; optical sensor; sensor element; optical method; optical wave; /359/324/

Citation Formats

Duncan, Paul G. Semiconductor sensor for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets. United States: N. p., 2002. Web.
Duncan, Paul G. Semiconductor sensor for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets. United States.
Duncan, Paul G. Tue . "Semiconductor sensor for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets". United States. https://www.osti.gov/servlets/purl/874673.
@article{osti_874673,
title = {Semiconductor sensor for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets},
author = {Duncan, Paul G},
abstractNote = {Described are the design of a rare earth iron garnet sensor element, optical methods of interrogating the sensor element, methods of coupling the optical sensor element to a waveguide, and an optical and electrical processing system for monitoring the polarization rotation of a linearly polarized wavefront undergoing external modulation due to magnetic field or electrical current fluctuation. The sensor element uses the Faraday effect, an intrinsic property of certain rare-earth iron garnet materials, to rotate the polarization state of light in the presence of a magnetic field. The sensor element may be coated with a thin-film mirror to effectively double the optical path length, providing twice the sensitivity for a given field strength or temperature change. A semiconductor sensor system using a rare earth iron garnet sensor element is described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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Works referenced in this record:

Small optical magnetic-field sensor that uses rare-earth iron garnet films based on the Faraday effect
journal, January 1999


Epitaxial yttrium iron garnet films grown by pulsed laser deposition
journal, July 1993


Bi-substituted rare-earth iron garnet composite film with temperature independent Faraday rotation for optical isolators
journal, September 1987


High sensitivity fiber-optic magnetic field sensors based on iron garnets
journal, April 1995


Optical magnetic field sensors with high linearity using Bi-substituted rare earth iron garnets
journal, January 1995


Faraday rotation and optical absorption of a single crystal of bismuth‐substituted gadolinium iron garnet
journal, October 1973


Magnetooptic rib waveguides in YIG: an experiment
journal, January 1984


Low-noise LD module with an optical isolator using a highly bi-substituted garnet film
journal, February 1987


Magnetic and magneto‐optic properties of praseodymium‐ and bismuth‐substituted yttrium iron garnet films
journal, July 1986


Magneto-optic magnetic field sensors based on uniaxial iron garnet films in optical waveguide geometry
journal, November 1993


Y-branch interferometer in YIG film grown by liquid phase epitaxy
journal, January 1984


Magneto‐optic channel waveguides in Ce‐substituted yttrium iron garnet
journal, October 1993


Magnetic garnet films prepared by ion beam sputtering and their application to optical isolators
journal, November 1991


Thermal magnon fluctuations in guided‐wave Faraday rotation
journal, December 1991


The Optical Transparency of Yttrium iron Garnet in the near Infrared
journal, July 1965


Bismuth‐ and aluminum‐substituted YIG single‐crystal films on modified gadolinium gallium garnet single‐crystal substrates
journal, August 1991


Magneto-optic magnetic field sensor with 1.4 pT/√(Hz) minimum detectable field at 1 kHz
journal, May 1993


Three-dimensional (BiY)_3Fe_5O_12 waveguide with a load layer made of SiO_2
journal, January 1991


Faraday effect current sensor with improved sensitivity–bandwidth product
journal, January 1994


Yig-Sensor Design For Fibre Optical Magnetic Field Measurements
conference, November 1984


Temperature-stabilized optical isolator for collimated light using (BiLuGd)_3Fe_5O_12/(BiGd)_3(FeGa)_5O_12 composite film
journal, January 1988


Molecular field theory analysis of magneto‐optic sensitivity of gallium‐substituted yttrium iron garnets
journal, July 1996


Refractive index of Bi‐substituted gadolinium iron garnet films grown by liquid‐phase epitaxy
journal, July 1985


Wavelength independent Faraday isolator
journal, January 1989


Measurement system for magneto-optic sensor materials
journal, October 1984


Faraday Rotation in Rare-Earth Iron Garnets
journal, May 1969


Wide-band infrared magneto-optic modulation
journal, September 1966


Magneto-optic characterization of iron garnet crystals using photoelastic modulation
journal, September 1992


Fast, sensitive magnetic-field sensors based on the Faraday effect in YIG
journal, January 1990


Sensitivity limits to ferrimagnetic Faraday effect magnetic field sensors
journal, November 1991


High‐resolution x‐ray‐diffraction analysis of epitaxially grown yttrium iron garnet films on gadolinium gallium garnet
journal, June 1996


Magneto-optical enhancement in sputtered epitaxial films of praseodymium-substituted yttrium iron garnet
journal, August 1997


Infrared and Visible Laser Modulation using Faraday Rotation in YIG
journal, March 1966


Magneto-optical properties of (BiGdY) iron garnets for optical magnetic field sensors
journal, January 1996


Faraday rotation of terbium-yttrium ferrite garnet
journal, January 1990


Epitaxial liftoff of thin oxide layers: Yttrium iron garnets onto GaAs
journal, November 1997


Temperature dependence of domain‐wall coercive field in magnetic garnet films
journal, April 1992


Epitaxial waveguides of aluminum garnet
journal, July 1993


Current sensing using bismuth rare-earth iron garnet films
journal, January 1995


Novel bulk iron garnets for magneto-optic magnetic field sensing
journal, January 1994


Electro-Optical Effect of Bi 4 Ge 3 O 12 Crystals for Optical Voltage Sensors
journal, September 1993


Ferromagnetic resonance of single‐crystal YIG/gadolinium gallium garnet/YIG layers
journal, March 1990


Preparation and magneto‐optic properties of Bi‐substituted yttrium iron garnet thin films by metalorganic chemical vapor deposition
journal, March 1991


Magneto‐optics and motion of the magnetization in a film‐waveguide optical switch
journal, July 1974


Fault section detection system for 66 kV underground branch transmission lines using optical magnetic field sensors
journal, January 1992


High frequency magnetic field sensors based on the Faraday effect in garnet thick films
journal, April 1992


The performance of a fiber optic magnetic field sensor utilizing a magneto-optical garnet
journal, April 1992


Temperature-stabilized fiber-optic magnetic-field sensors using mixed rare-earth garnet crystals
conference, January 1983


Submicroampere-per-root-hertz current sensor based on the Faraday effect in Ga:YIG
journal, January 1993


Magnetooptic properties and applications of bismuth substituted iron garnets
journal, July 1976


Innovative improvements in bismuth-doped rare-earth iron garnet Faraday rotators
journal, January 1996


Magneto-optic sensors based on iron garnets
journal, January 1996


Iron garnet crystals for magneto‐optic light modulators at 1.064 μm
journal, April 1973


Domain effects in Faraday effect sensors based on iron garnets
journal, January 1995


Measuring the wavelength dependence of magnetooptical Kerr (or Faraday) rotation and ellipticity: a technique
journal, January 1990


Ferromagnetic relaxation in LPE‐grown Eu‐Ga substituted yttrium iron garnet films
journal, November 1986


Ce-substituted yttrium iron garnet films prepared on Gd3Sc2Ga3O12 garnet substrates by sputter epitaxy
journal, September 1997


Cation distribution of indium‐substituted garnet, Y 2.4 In 0.6 Fe 5 O 12
journal, February 1995


Magneto‐optical properties of (BiGdY) 3 Fe 5 O 12 for optical magnetic field sensors
journal, May 1994


Fiber-optic Faraday-effect magnetic-field sensor based on flux concentrators
journal, January 1996


Electromagnetic field components: their measurement using linear electrooptic and magnetooptic effects
journal, January 1975