RFOG rotation rate error reducer having resonator mode symmetriz

Details RFOG rotation rate error reducer having resonator mode symmetriz RFOG rotation rate error reducer having resonator mode symmetriz

1992-01-16

1994-03-22

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1972

Patent

active

052969126

ABSTRACT:
An error reducer for reducing rotation rate errors, arising because of polarization modes coupling and differing polarization modes characteristics associated with a coiled optical fiber in a rotation sensor, by causing an electromagnetic wave source to direct electromagnetic waves propagating in one of said opposing directions to oscillate in frequency value between frequencies occurring in adjacent opposite polarization mode resonances of those waves.

REFERENCES:
patent: 4514088 (1985-04-01), Coccoli
patent: 4702600 (1987-10-01), Handrich et al.
patent: 5018857 (1991-05-01), Sanders et al.
"Novel Polarization-rotating Fiber Resonator for Rotation Sensing Applications," G. Sanders et al, Fiber Optic and Laser Sensors VII, Proceedings of SPIE, vol. 1169 Sep. 1989, pp. 373-381.
"Evaluation of the Output Error in an Optical Passive Ring-Resonator Gyro with a 90.degree. Polarization-Axis Rotation in the Polarization-Maintaining Fiber Resonator," K. Takiguchi et al, IEEE Photonics Technology Letters vol. 3 #1, Jan. 1991, pp. 88-90.
"Polarization Fading Effects in Polarization-Preserving Fiber Ring Resonator," P. Mouroulis, Proceedings of SPIE, vol. 1169, Fiber Optic and Laser Sensors VII (1989) pp. 400-412.
"Drift Reduction in an Optical Passive Ring-Resonator Gyro," K. Hotate et al, Proceedings of SPIE, vol. 1585 Fiber Optic Gyros: 15th Anniversary Conference (1991), pp. 116-123.
"Resonator Fiber Optic Gyro Employing a Polarization-Rotating Resonator," L. Strandjord et al, Proceedings of SPIEvol. 1585 Fiber Optic Gyros: 15th Anniversary Conference (1991) pp. 163-172.

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