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Proceedings Paper

Drift-compensating FOG modulation/signal processing technique
Author(s): Walter Kaegi; Frank J. Furrer; Alex van Heereveld
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Paper Abstract

A FOG has two electrical signal interfaces: the input u(t) for the modulation signal and the output v(t) from the photodetector. The signal path u(t) to v(t) through the Sagnac-interferometer can be modeled as a nonlinear transmission channel. The characteristics of this transmission channel are dependent on the parameter rotation rate Phi(s). A combination of variable period serrodyne and fixed frequency sine signals is used as the modulation signal u(t). The received spectrum of v(t) depends on the rotation rate Phi(s). It is shown analytically that the Sagnac-shift is exactly compensated, when the amplitudes of two of the spectral components are equal.

Paper Details

Date Published: 1 February 1992
PDF: 15 pages
Proc. SPIE 1585, Fiber Optic Gyros: 15th Anniversary Conf, (1 February 1992); doi: 10.1117/12.135052
Show Author Affiliations
Walter Kaegi, Swiss Air Force Command (Switzerland)
Frank J. Furrer, SENSOptic AG (Switzerland)
Alex van Heereveld, LightWork BV (Netherlands)

Published in SPIE Proceedings Vol. 1585:
Fiber Optic Gyros: 15th Anniversary Conf
Shaoul Ezekiel; Eric Udd, Editor(s)

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