Optical measuring device using optical fibers

Optical measuring device for measuring physical magnitudes, comprising:

• a sensor actuated by the physical magnitude to be measured;
• means for generating optic input signals to said sensor;
• means for processing optic output signals emanating from said sensor and including at least two optical detection means;
• at least one optical input fiber for transmitting said optic input signals to said sensor and at least two optical output fibers for transmitting said optic output signals to said at least two optical detection means;
• said sensor including means for modulating at least a portion of the light conducted thereto such that said optic output signals contain at least one measuring component representative of the magnitude to be measured and at least one stabilizing component with a smaller dependence on said physical magnitude than said measuring component;
• and
• said means for processing further including means for separating said at least one measuring component and said at least one stabilizing component, and means for generating therefrom at least one measuring signal and at least one compensating signal, and means responsive to said at least one compensating signal for reducing the dependence of said measuring signal on instabilities in the the measuring device.