MAS Bulletin. GY-90 Fiber Optic Gyro

Abstract

Electronica San Giorgio ELSAG S.p.A., Genoa, Italy, has developed a fiber optic gyro (FOG) for use on short range missiles and torpedoes, and in fire control systems. The FOG is based on the Sagnac effect. When two counter propagating beams of light are subjected to an angular rotation in their planes, that motion causes one of the beams to transit slightly greater path length than the other. This creates a shift in the relative phase of the two beams, proportional to rotation rate. The accuracy of Sagnac effect is proportional to the length of the optical path and an extremely long optical path can be achieved in a small size by using a many-turn coil of optical fiber. There are no moving parts and thus virtually no maintenance. The FOG has a very short run- up and warm-up time. It is all solid state, is insensitive to accelerations, and has a wide dynamic and frequency range. The GY-90 is designed to meet the environmental standards of MIL-STD-810.

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Document Details

Document Type
Technical Report
Publication Date
Jul 20, 1989
Accession Number
ADA233487

Entities

Organizations

  • Office of Naval Research

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Control Systems
  • Dynamic Range
  • Fiber Optics
  • Fibers
  • Fire Control Systems
  • Frequency
  • Materials
  • Middle East
  • Military Applications
  • Military Research
  • New York
  • Optical Fibers
  • Rotation
  • Standards

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Control Systems Engineering.
  • Optical Physics and Photonics.