Fiber-optic gyroscope using single birefringent material for dep

Details Fiber-optic gyroscope using single birefringent material for dep Fiber-optic gyroscope using single birefringent material for dep

1993-03-08

1994-12-06

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1972

Patent

active

053715950

ABSTRACT:
A fiber-optic gyroscope having a depolarizer installed near the fiber coil and a polarizer disposed in the optical path before the light is divided in two partial lights to avoid the fluctuation of the light power passing reversely through the polarizer induced by the rotation of the polarization plane of the light. However, since the light emitting device emits a linearly polarized light, the light power first passing through the polarizer will fluctuate by the rotation of the polarization plane. This invention adds another depolarizer between the light emitting device and the polarizer in order to kill such a fluctuation.

REFERENCES:
patent: 4621925 (1986-11-01), Masuda et al.
patent: 4828389 (1989-05-01), Gubbins
patent: 5245407 (1993-09-01), Nishiura et al.

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