Device for measuring a non-reciprocal effect, in particular...

Details Device for measuring a non-reciprocal effect, in particular... Device for measuring a non-reciprocal effect, in particular...

2006-10-31

2006-10-31

Lee, Hwa (Andrew) (Department: 2877)

Optics: measuring and testing

By light interference

Rotation rate

Reexamination Certificate

active

07130053

ABSTRACT:
The invention relates to the field of devices for measuring a nonreciprocal effect and especially to the field of fiber-optic gyrometers. Disclosed a device for measuring a nonreciprocal effect comprising a light source, a monomode spatial filter, a Sagnac ring having two branches, a light splitter, and a light detector. The splitter is a polarization splitter. The filter is nonpolarizing. The detector includes a system for analyzing the polarization state. The light splitter devides the light over branches of the ring. The invention can be applied to other devices for measuring a nonreciprocal effect, especially fiber-optic magnetometers.

REFERENCES:
patent: 4286878 (1981-09-01), Pircher
patent: 4456377 (1984-06-01), Shaw et al.
patent: 5270791 (1993-12-01), Lefevre et al.
patent: 5677767 (1997-10-01), Shirasaki et al.
patent: 198 03 223 (1999-07-01), None
patent: 2 046 470 (1980-11-01), None
Gyromètre à fibre optique: principles et technologies[Fiber-optic gyrometer: principles and technologies] authored by H.J. Arditty, Ph. Graindorge and H.C. Lefevre from the THOMSON-CSF Central Research Laboratory, was published inRevue technique THOMSON-CSF, vol. 15, N°3, pp. 777 to 807, in Sep. 1983.

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