Reduction of light-source-induced scale-factor nonlinearities in low-cost fiber optic gyroscope

Wolfgang Ecke; Klaus Hilpert; Andreas Holz; Rudolf Mueller; Michael Neukirch; Reinhardt Willsch

doi:10.1117/12.258185

12 November 1996 Reduction of light-source-induced scale-factor nonlinearities in low-cost fiber optic gyroscope

Wolfgang Ecke, Klaus Hilpert, Andreas Holz, Rudolf Mueller, Michael Neukirch, Reinhardt Willsch

Proceedings Volume 2837, Fiber Optic Gyros: 20th Anniversary Conference; (1996) https://doi.org/10.1117/12.258185
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

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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