Accession Number : ADD010693

Title :   Optical Gyroscope with Time Dependent Wavelength.

Descriptive Note : Patent,


Personal Author(s) : Sheem,S K

Report Date : 11 Oct 1983

Pagination or Media Count : 8

Abstract : A Sagnac rotation sensing interferometer disposed on a rotating platform for use as a gyroscope comprising a wound optical fiber light depth, a beam splitter for splitting a light beam into two beams directed to traverse the optical path in opposite directions, a light source circuit for generating a light beam which is switched between two wavelengths at a switching or modulation frequency substantially higher than the speed of change of the phase due to rotation, and a detector for extracting a signal from the recombined beam interference pattern at the wavelength modulation frequency, this signal being proportional to the phase shift caused by rotation. (Author)

Descriptors :   *Patents, *Gyroscopes, *Optical interferometers, *Ring lasers, Fiber optics, Beam splitting, Phase shift, Harmonic generators, Time dependence, Rotation, Noise, Electronic switching, Helixes, Sensitivity

Subject Categories : Lasers and Masers
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE