Optical fibre interferometric gyrometer with polarization switch

Details Optical fibre interferometric gyrometer with polarization switch Optical fibre interferometric gyrometer with polarization switch

1979-07-09

1981-09-01

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356351, G01C 1964

Patent

active

042868785

ABSTRACT:
An interferometric gyrometer using a laser source and beam separator forming two waves each directed to one end of a wound monomode fiber and recombined after passage. A permanent phase shift equal to .pi./2 is introduced between the two waves emerging from the ends of the fiber, and a switch is alternately shifted between a state transmitting the recombined waves and a state inverting the phase of the recombined waves. A synchronous demodulator, receiving the detected and amplified signal and a signal synchronous with the control signal applied to the switch supplies a signal proportional to the speed of rotation of the gyrometer.

REFERENCES:
patent: 3867034 (1975-02-01), Aronowitz
patent: 4013365 (1977-03-01), Vali et al.

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