Accession Number : ADD008665

Title :   Pulsed Ring Laser Fiber Gyro.

Descriptive Note : Patent,


Personal Author(s) : Fletcher,Paul C ; Hildebrand,Verne E

Report Date : 24 Mar 1981

Pagination or Media Count : 4

Abstract : An improvement for a ring laser gyro employs pulsed optical signals in a fiber optic loop. Clockwise and counterclockwise traveling pulsed optical signals are generated by a pair of optical amplifiers and a beamsplitter/coupler feeds the signals to a detector. The clockwise and counterclockwise signals do not meet in either of the optical amplifiers, but do arrive in coincidence at the beamsplitter and detector. Although low rotation rate lock-in limits the minimum detection rate in a continuous wave laser gyro, it does not so restrict the pulsed laser gyro's ability to detect low rotation rates because there is little, if any, coupling between the clockwise and counterclockwise modes of signal propagation. (Author)

Descriptors :   *Patents, *Ring lasers, *Gyroscopes, *Fiber optics, Pulsed lasers, Sensitivity, Rotation, Optical circuits, Couplers, Beam splitting, Inertial systems, Optical detectors, Photomultiplier tubes

Subject Categories : Lasers and Masers
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE