CLOSED LOOP, DEPOLARIZED INTERFEROMETRIC FIBER OPTIC (IFOG) GYROSCOPE WITH SELF ADJUSTING SERRODYNE PHASE NULLING; PATENT

An interferometric fiber optic gyroscope employing an integrated, width polished, optic chip containing annealed proton exchange waveguides and a Mach-Zehnder interferometer for sensing a ramp induced signal from loop closing electronics to achieve a highly improved gyroscope scale factor linearity and dynamic range. An edge light emitting diode (ELED) operating at 1.3 micron wavelength is employed as the light source in the gyroscope. A decorrelator optical fiber segment is employed between the light source and the chip, and a Lyot depolarizer optical fiber segment is employed between the chip and one side of the fiber optic coil. Also, an intermediate output of the loop closing electronics is shown to have reduced scale factor sensitivity to light source wavelength change.

  • Supplemental Notes:
    • Filed 4 Jun 90 patented 14 Jun 94; Supersedes PAT-APPL-7-534 202.; This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of patent available Commissioner of Patents, Washington, DC 20231.; Patent
  • Corporate Authors:

    Department of the Navy

    Washington, DC  United States 
  • Authors:
    • Bramson, M D
  • Publication Date: 1990-6-4

Language

  • English

Media Info

  • Pagination: 13 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00670555
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-7-534 202; PATENT-5 321 503
  • Files: TRIS
  • Created Date: Jan 11 1995 12:00AM