Optical power balancing in interferometric fiber optic gyroscope

Details Optical power balancing in interferometric fiber optic gyroscope Optical power balancing in interferometric fiber optic gyroscope

1995-06-07

1996-10-08

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

055637051

ABSTRACT:
An interferometric fiber optic gyroscope having a wavelength-sensitive splitter which has a splitting ratio that changes according to light wavelength. A feedback circuit indicates any difference that there might be in the intensities of counterpropagating beams in the sensing loop of the gyroscope, and provides a signal to the light source to change the light wavelength in a direction to cause the splitter ratio to change so as to equalize the beams' intensities for eliminating the Kerr effect.

REFERENCES:
patent: 4673293 (1987-06-01), Sanders
patent: 4773759 (1988-09-01), Bergh et al.
patent: 5018859 (1991-05-01), Chang et al.
patent: 5098188 (1992-03-01), Melvern
patent: 5111326 (1992-05-01), Ball
patent: 5351252 (1994-09-01), Toyama et al.
G. Sanders, "Critical review of resonator fiber optic gyroscope technology," Fiber Optic Sensors vol. CR44 SPIE Optical Engineering Press Proceedings of the Conference of SPIE, Boston, Mass. (Sep. 8-11, 1992), pp. 133-159.

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