Sub-tau phase modulation in a fiber-optic rotation sensor

Details Sub-tau phase modulation in a fiber-optic rotation sensor Sub-tau phase modulation in a fiber-optic rotation sensor

1989-05-24

1990-08-14

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

049482521

ABSTRACT:
A method and apparatus are disclosed for closed-loop phase modulation to measure rate and control phase modulator gain errors in an electrical signal representing the phase difference between first and second light signals from light waves counterpropagating in an interferometric rotation sensor including a closed light path with a phase modulator in the path. The disclosed method and apparatus correct phase modulator gain in a way that is independent of rate.

REFERENCES:
patent: 4707136 (1987-11-01), Kim
Fiber-Optic Gyroscopes: Advances and Future Developments, Pavlath et al., Navigation, 1984, pp. 70-83.

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