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

摘要

In a method for determining / compensation of the by means of the light source (1) induced bias - / random walk errors - - in fiber-optic sagbac - interferometers, which a modulation method for stochastically independent shifting of the operating point to the points of highest sensitivity use of a reference beam is from the emitted by the light source of the interferometer, on the fiber coil incoming light beam is coupled out, which is proportional to the intensity of the reference beam - a reference intensity signal is generated, 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 demodulated demodulation pattern used, whereby 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 chronologically coordinated such that the signal components - of the reference intensity signal and of the rotation rate intensity signal -, each of which consists for the same point in time of the light source (1) result from light components simultaneously emitted are identically demodulated.