1 February 1992 Drift-compensating FOG modulation/signal processing technique
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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.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Walter Kaegi, Walter Kaegi, Frank J. Furrer, Frank J. Furrer, Alex van Heereveld, Alex van Heereveld, } "Drift-compensating FOG modulation/signal processing technique", Proc. SPIE 1585, Fiber Optic Gyros: 15th Anniversary Conf, (1 February 1992); doi: 10.1117/12.135052; https://doi.org/10.1117/12.135052

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