Two depolarizer fiber-optic gyroscope that eliminates interferen

Details Two depolarizer fiber-optic gyroscope that eliminates interferen Two depolarizer fiber-optic gyroscope that eliminates interferen

1993-01-08

1994-11-15

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

053653394

ABSTRACT:
A fiber-optic gyroscope has a polarizer, a fiber coil and couplers. A light beam is polarized, divided into two beams and introduced into the fiber coil. Two depolarizers are provided; one between a light source and a polarizer, the other between the fiber coil and a coupler. To clarify the condition for avoiding interference between two depolarizers is a purpose of this invention. Four birefringent materials A, B C and D should satisfy inequalities;

REFERENCES:
patent: 4529313 (1985-07-01), Petermann et al.
patent: 4572608 (1986-02-01), Mochizuki et al.
Bohm et al, "Low-Drift Fibre Gyro Using a Superluminescent Diode", Electronics Letters, vol. 17, No. 10, May 1981, pp. 352-353.

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