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Class Information
Number: 250/227.17
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Light conductor > Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell) > Causing polarization change in fiber
Description: Subject matter in which the condition sensed changes the polarization of the light passing through the fiber due to some parameter affecting the fiber so that light of a different polarization reaches the photodetector than was incident on the fiber.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7376298 |
Optical rotating data transmission device with an unobstructed diameter |
May. 20, 2008 |
| 7373056 |
High-voltage component with optical fiber and method for producing it |
May. 13, 2008 |
| 7358858 |
Road-ice detecting sensor, method for installing same, and road-ice detecting method |
Apr. 15, 2008 |
| 7158275 |
Polarization modulator |
Jan. 2, 2007 |
| 7076122 |
Patch-type extrinsic Fabry-Perot interferometric fiber optic sensor and real-time structural vibration monitoring method using the same |
Jul. 11, 2006 |
| 6973223 |
Device for providing polarized light |
Dec. 6, 2005 |
| 6946646 |
Method of evaluating fiber PMD using polarization optical time domain reflectometry |
Sep. 20, 2005 |
| 6920411 |
Method for configuring an operational characteristic of a proximity sensor |
Jul. 19, 2005 |
| 6897434 |
All-fiber photon-pair source for quantum communications |
May. 24, 2005 |
| 6898339 |
Multiple mode pre-loadable fiber optic pressure and temperature sensor |
May. 24, 2005 |
| 6885782 |
Feedback polarization controller |
Apr. 26, 2005 |
| 6738145 |
Micromachined, etalon-based optical fiber pressure sensor |
May. 18, 2004 |
| 6727491 |
Sensor and method for detecting changes in distance |
Apr. 27, 2004 |
| 6703821 |
Faraday-effect current sensor with improved vibration response |
Mar. 9, 2004 |
| 6683447 |
Electro-optic apparatus for measuring signal potentials |
Jan. 27, 2004 |
| 6683297 |
Fiber grating moisture and chemical sensing system |
Jan. 27, 2004 |
| 6630658 |
Fiber laser pressure sensor |
Oct. 7, 2003 |
| 6521884 |
Distance measuring device with magneto-optical effect and measuring chain incorporating same |
Feb. 18, 2003 |
| 6515467 |
Method and system for optically detecting an electric current by means of light signals having different wavelengths |
Feb. 4, 2003 |
| 6507012 |
Method and apparatus for detecting malfunctions in communication systems |
Jan. 14, 2003 |
| 6498654 |
Optical proximity detector |
Dec. 24, 2002 |
| 6462856 |
Method and apparatus for modulating an optical signal using polarization |
Oct. 8, 2002 |
| 6456419 |
Frequency modulated liquid crystal beamsteering device |
Sep. 24, 2002 |
| 6388434 |
Electro-optic high voltage sensor |
May. 14, 2002 |
| 6380533 |
Method for measurement of first-and second-order polarization mode dispersion vectors in optical fibers |
Apr. 30, 2002 |
| 6307666 |
Voltage sensing systems and methods for passive compensation of temperature related intrinsic phase shift |
Oct. 23, 2001 |
| 6194706 |
Methods and systems for locating buried fiber optic cables |
Feb. 27, 2001 |
| 6188811 |
Fiber optic current sensor |
Feb. 13, 2001 |
| 6166372 |
Polarization detection device and method for producing the same |
Dec. 26, 2000 |
| 6147341 |
Temperature compensating device for fiber gratings |
Nov. 14, 2000 |
| 6144450 |
Apparatus and method for improving the accuracy of polarization mode dispersion measurements |
Nov. 7, 2000 |
| 6133721 |
Glass fiber current sensor and method of use therefor |
Oct. 17, 2000 |
| 6134281 |
Method and apparatus for calibration of a signal processing system utilizing digital down converters |
Oct. 17, 2000 |
| 6128423 |
Reflection type magneto-optic sensor |
Oct. 3, 2000 |
| 6122415 |
In-line electro-optic voltage sensor |
Sep. 19, 2000 |
| 6020584 |
Method of measuring the polarization mode dispersion of an optical waveguide device |
Feb. 1, 2000 |
| 5982174 |
External cavity fiber Fabry-Perot magnetometer |
Nov. 9, 1999 |
| 5965874 |
Method and apparatus for measuring the polarization characteristics of optical transmission medium |
Oct. 12, 1999 |
| 5963312 |
Optical transmission system fault analysis |
Oct. 5, 1999 |
| 5945667 |
Method for temperature compensation of measuring signals of a fiber-optic sensor |
Aug. 31, 1999 |
| 5939711 |
Electro-optic voltage sensor head |
Aug. 17, 1999 |
| 5912457 |
Optically-based pressure sensor having temperature compensation |
Jun. 15, 1999 |
| 5895912 |
Method and device for measuring an alternating electric quantity with temperature compensation by fitting |
Apr. 20, 1999 |
| 5869835 |
Asymmetric fiber optic grating sensor |
Feb. 9, 1999 |
| 5859531 |
Displacement apparatus using a magnetic optic sensor and position dependent magnetic field |
Jan. 12, 1999 |
| 5841131 |
Fiber optic pressure transducers and pressure sensing system incorporating same |
Nov. 24, 1998 |
| 5831263 |
In-cylinder pressure sensing apparatus for multi-cylinder engine |
Nov. 3, 1998 |
| 5780845 |
Optical current transformer |
Jul. 14, 1998 |
| 5780847 |
Verdet constant temperature-compensated current sensor |
Jul. 14, 1998 |
| 5737278 |
Extended, flexible, spatially weighted fiber optic interferometric hydrophone |
Apr. 7, 1998 |
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