Method and amplifying stage for suppressing modulation...

Details Method and amplifying stage for suppressing modulation... Method and amplifying stage for suppressing modulation...

2011-01-11

2011-01-11

Connolly, Patrick J (Department: 2877)

Optics: measuring and testing

By light interference

Rotation rate

C356S463000

Reexamination Certificate

active

07869052

ABSTRACT:
A device and a method for suppressing 2nd order harmonic distortion in a Resonator Fiber Optic Gyroscope includes driving a laser to generate at least one of a plurality of counter propagating laser beams traveling through a fiber optic resonator according to a modulated signal. The modulated signal can be represented by a polynomial having two terms, and each of the two terms is suitably multiplied by a coefficient and a constant. A modulation amplitude adjuster amplifies the modulation signal by an amplification factor as it is used to drive the laser. When the amplification factor is suitably chosen to represent a square root of a ratio of the constants, the total harmonic distortion in the RFOG is minimized.

REFERENCES:
patent: 5289258 (1994-02-01), Szafraniec et al.
patent: 5459575 (1995-10-01), Malvern
patent: 5610714 (1997-03-01), Malvern et al.

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