Method for compensating light source wavelength variability in a

Details Method for compensating light source wavelength variability in a Method for compensating light source wavelength variability in a

1994-02-14

1995-12-05

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1972

Patent

active

054734304

ABSTRACT:
A method for compensating for light source wavelength variation in a fiber optic gyro having a closed reset control loop. The method employs the finding that the voltage range required for a 2.pi. phase shift in a phase modulator is a function of the wavelength of the gyro light source. The voltage required for affecting the 2.pi. phase shift in such a gyro is regulated according to the invention and utilized to compensate changes in light source wavelength or scale factor. Phase modulator temperature is also taken into account for precise compensation.

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