12 November 1984 Fiber Optic Gyro With Digital Data Processing
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Proceedings Volume 0514, 2nd Intl Conf on Optical Fiber Sensors: OFS'84; (1984) https://doi.org/10.1117/12.945093
Event: 2nd International Conference on Optical Fiber Sensors, 1984, Stuttgart, Germany
Abstract
Fiber optic gyros make use of the Sagnac-effect for rotation rate measurement. Two counterpropagating light beams travelling through a coil with length L and diameter D experience a phase shift 2ΔΦ which is given by (1) 2ΔΦ 2LD Ω λ= wavelength c = velocity of light Ω = angular velocity This phase shift can be detected with a 'phase-nulling scheme' or by direct detection /1/. The direct detection has the advantage of an uncomplicated optical set-up (Fig. 1, /2/), but the signal detection raises some problems. By using an analogue system the linearity and the dynamic range are subject to severe limitations. To overcome these problems we use a digital signal detection scheme.
© (1984) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. Bohm, P. Marten, L. Staudigel, E. Weidel, "Fiber Optic Gyro With Digital Data Processing", Proc. SPIE 0514, 2nd Intl Conf on Optical Fiber Sensors: OFS'84, (12 November 1984); doi: 10.1117/12.945093; https://doi.org/10.1117/12.945093
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