Accession Number : ADD016367

Title :   Fiber Optic Gyroscopes with Depolarized Light.

Descriptive Note : Patent, Filed 25 Aug 92, patented 7 Jun 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kersey, Alan D ; Burns, William K ; Moeller, Robert P

Report Date : 07 Apr 1994

Pagination or Media Count : 24

Abstract : A depolarized fiber optic gyroscope with a detector for detecting a rotation about an axis of rotation and a method therefor is disclosed. The gyroscope includes a depolarized light source for generating the depolarized light; a gyro coil for, conducting depolarized light about the axis of rotation, the gyro coil including a coil of a non-polarization preserving fiber having first and second ends; a depolarizer with first and second ports for eliminating birefringence induced scale factor variations caused by the non-polarization preserving fiber, the first port of the depolarizer being coupled to the first end of the gyro coil; and a coupler device for coupling the second end of the gyro coil, the second port of the depolarizer, the detector and the depolarized light source, without utilizing a polarizer.

Descriptors :   *FIBER OPTICS, *GYROSCOPES, *PATENTS, BIREFRINGENCE, COILS, COUPLERS, COUPLINGS, DETECTORS, LIGHT SOURCES, OPTICS, POLARIZATION, LOW COSTS

Subject Categories : Navigation and Guidance
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE