Accession Number : ADA138092

Title :   Extraction of Rotation Information from a Simulated Fiber Optic Gyro Using Amplitude Modulation.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Brett,D J

PDF Url : ADA138092

Report Date : Dec 1983

Pagination or Media Count : 84

Abstract : The purpose of this experiment was to determine feasibility of the amplitude modulated dither technique of extracting rotation information from a fiber optic gyroscope. By varying the amplitude of the modulation appropriately, information can be obtained at points on the output intensity curve that are most sensitive to rotation. These points are also in the most linear region of the curve. A Michelson interferometer is used to simulate a Sagnac interferometer undergoing rotation. A digital control loop processes the information obtained by amplitude modulation and generates a feedback signal to null the path length difference. The feedback signal is monitored while a rotation simulation signal is introduced to the interferometer. The feedback signal tracks the simulation signal at 180 degrees out of phase (negative feedback). The test setup performs as expected to the hardware and operating frequency limits. (Author)

Descriptors :   *Gyroscopes, *Fiber optics, *Michelson interferometers, *Rotation, *Laser beams, Sensitivity, Signals, Simulation, Amplitude modulation, Length, Digital systems, Feedback, Output, Loops, Intensity, Interferometers, Extraction, Graphs, Control, Paths, Theses

Subject Categories : Lasers and Masers
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE