Method for measurement of PNR bias error in an interferometric f

Details Method for measurement of PNR bias error in an interferometric f Method for measurement of PNR bias error in an interferometric f

1998-12-10

2000-09-05

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01K 1972

Patent

active

061151246

ABSTRACT:
A method for measuring intensity-type polarization non-reciprocity (PNR) bias error in an interferometric fiber optic gyroscope (IFOG) using birefringence modulation. The counter-propagating waves in the fiber optic loop of the IFOG are modulated with a slowly varying voltage signal, such as a triangle wave, ramp or sine wave signal, to cause birefringence modulation. A peak-to-peak amplitude of a resultant output signal is measured to determine the intensity-type PNR bias error of the IFOG.

REFERENCES:
patent: 4869592 (1989-09-01), Bergh
patent: 4881817 (1989-11-01), Kim et al.
patent: 5037205 (1991-08-01), Pavlath

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