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12 November 1996 Reduction of light-source-induced scale-factor nonlinearities in low-cost fiber optic gyroscope
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Abstract
Laser diodes in sub-threshold regime are used as low- coherent broadband light sources in low-cost interferometric fiber-optic gyroscopes with better than 2 degrees/h bias repeatability over -30 degrees...+70 degrees C temperature range. The optical reflectivity of the laser diode causes nonlinear contributions to the interferometer output signal. Corresponding to theoretical calculations, the scale factor error varies in dependence on the actual rotation rate. This error for the present has been reduced to about 30 percent applying an active compensation of the light reflected in the laser diode.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wolfgang Ecke, Klaus Hilpert, Andreas Holz, Rudolf Mueller, Michael Neukirch, and Reinhardt Willsch "Reduction of light-source-induced scale-factor nonlinearities in low-cost fiber optic gyroscope", Proc. SPIE 2837, Fiber Optic Gyros: 20th Anniversary Conference, (12 November 1996); https://doi.org/10.1117/12.258185
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