A method for determining / compensation of induced by the light source bias - / random walk errors - - in fiber-optic sagnac - interferometers

摘要

A method for determining / compensation of by means of the light source (1) induced bias - / random walk errors - - in fiber-optic sagnac - interferometers, which a modulation method for stochastically independent shifting of the operating point to the points of highest sensitivity used, comprising the steps of:– Coupling out of a reference beam from the light passing through the interferometer with the use of a coupler in such a way that the intensity of the reference beam is proportional to the intensity of the in the fibre optic of the interferometer is irradiated light, not, however, due to modulation - and / or return is subject to changes caused by the adjustment processes;– Generating a of the intensity of the reference beam - a reference intensity signal is proportional to the fact that the output signal of a photodetector, which is acted upon with the reference beam, is tapped off;– Demodulation of the reference intensity signal - with the use of the generally in the rates of circle (7, 13) used, for demodulating the rotation rate proportional - rotation rate intensity signal demodulation pattern used with the use of a demodulator, as a result of which a demodulated reference - intensity signal is obtained, which is a measure for the to be determined and bias - / random walk errors - - represents,– the demodulation of the reference intensity signal - with respect to the demodulation of the rotation rates - intensity signal temporally..