Process and an apparatus for correcting the measuring signals of

Details Process and an apparatus for correcting the measuring signals of Process and an apparatus for correcting the measuring signals of

1994-01-21

1995-07-04

Limanek, Robert P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356149, G01C 1972, G01P 900

Patent

active

054305446

ABSTRACT:
In the case of a fiber optic gyro having a 4.times.4-coupler, the two arms of the coupler which are not connected with the fiber coil are each connected with a monitoring detector. From the output signals of these monitoring detectors, in the case of a desired wavelength, a reference or desired quotient is formed. During the operation of the fiber optic gyro, an actual quotient is in each case formed from these output signals and is compared with the stored desired quotient. The wavelength of a semiconductor laser is controlled by controlling the operating current and/or the temperature of the light source (L) such that the two quotients are identical. The measuring signals will then be error free.

REFERENCES:
patent: 5150956 (1992-10-01), Buhler et al.
patent: 5227860 (1993-07-01), Hartl et al.
Electron Letters, vol. 25, 1989, p. 682, "Monolithic 4.times.4 Single-Mode Fused Coupler".

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