Accession Number : ADD009998

Title :   Dual Cavity Laser Gyro.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Roberts,Thomas G ; Honeycutt,Thomas B

Report Date : 13 Dec 1982

Pagination or Media Count : 28

Abstract : A laser gyro having two cavities which are physically separated so that neither mode volumes have any common parts. Each cavity supports a wave traveling in only one direction either clockwise or counter-clockwise. Other waves, which are normally set up in a ring laser gyro, are prevented by a reversed feedback mirror. The gyro produces two waves whose frequencies are shifted in opposite directions by rotation. Lock-in is not possible. The two frequencies are mixed and the beat frequency is detected by optical heterodyne techniques. The response of this rotation sensor is linear down to zero rotation rate and its accuracy is limited by quantum effects. (Author)

Descriptors :   *Patent applications, *Ring lasers, *Gyroscopes, *Laser cavities, *Detectors, Beat signal, Helium neon lasers, Neodymium lasers, Carbon dioxide lasers, Dye lasers, Quantum theory, Frequency, Orientation(Direction), Reversible, Zeeman effect, Air, Argon, Helium, Nitrogen, Optics, Parts, Limitations, Mirrors, Rotation, Lasers, Supports, Feedback, Heterodyning, Volume, Cavities, Waves, Accuracy, Q factors

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE