Drift-compensating FOG modulation/signal processing technique

Walter Kaegi; Frank J. Furrer; Alex van Heereveld

doi:10.1117/12.135052

1 February 1992 Drift-compensating FOG modulation/signal processing technique

Walter Kaegi, Frank J. Furrer, Alex van Heereveld

Proceedings Volume 1585, Fiber Optic Gyros: 15th Anniversary Conf; (1992) https://doi.org/10.1117/12.135052
Event: OE Fiber, 1991, Boston, MA, United States

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.

Citation Download Citation

Walter Kaegi, Frank J. Furrer, and Alex van Heereveld "Drift-compensating FOG modulation/signal processing technique", Proc. SPIE 1585, Fiber Optic Gyros: 15th Anniversary Conf, (1 February 1992); https://doi.org/10.1117/12.135052

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