Accession Number:

ADA126803

Title:

Research on New Approaches to Optical Systems for Inertial Rotation Sensing

Descriptive Note:

Final rept. 1 Jan 1981-30 Apr 1982

Corporate Author:

STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS

Personal Author(s):

Report Date:

1983-03-01

Pagination or Media Count:

191.0

Abstract:

This report describes progress in the investigation of novel fiber optic Sagnac loop configurations for inertial rotation sensing, fiber gyros. One concept - the passive re-entrant Sagnac system PRS, in which two identical optical signals circulate around a multi-turn loop many times, with successive samplings of the difference signal after each transit of the total loop, has been successfully tested in a rotating all fiber system no bulk optics. Nineteen circulations were achieved, generating a sinusoidal output signal which represented several cycles of accumulating optical phase shift between the two counter-rotating optical waves. This experiment demonstrated for the first time the successful operation of a re-entrant Sagnac system but also demonstrated the tremendous value of the various fiber components developed in this laboratory which enabled an all fiber system to be used for this recirculating mode of operation of a fiber gyro. Eventually a bilateral amplifier will be incorporated in the fiber loop permitting many more recirculations of the two injected optical signals. This device is known as the active re-entrant Sagnac system ARS.

Subject Categories:

  • Lasers and Masers
  • Fiber Optics and Integrated Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE