| 摘要 |
PROBLEM TO BE SOLVED: To reduce the rotational speed error by removing the secondary harmonic frequency distortion in a resonator optical fiber gyro. SOLUTION: The device and the method for suppressing the second order harmonic distortion in a resonator fiber optic gyroscope includes modulating and driving a laser to generate at least one of a plurality of counter propagating laser beams traveling through the fiber optic resonator according to a modulated signal. The modulated signal can be represented with a polynomial having two terms, and each of the two terms is suitably multiplied by coefficients and constants. A modulation amplitude adjuster amplifies the modulation signal by an amplification factor 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 is minimized in the RFOG. COPYRIGHT: (C)2011,JPO&INPIT |
