Fiber optic gyro with low-birefringence and PM networks

Details Fiber optic gyro with low-birefringence and PM networks Fiber optic gyro with low-birefringence and PM networks

1991-11-25

1993-11-09

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

385 12, G01C 1972

Patent

active

052607682

ABSTRACT:
A fiber optic gyroscope is formed of two distinct sections, one having optical paths of low-birefringence fiber and the other having paths formed of polarization-maintaining (PM) fiber. The two sections are joined at a low-birefringence-PM fiber splice. The PM section includes at least one MIOC and an associated rotation sensing coil of PM fiber while the low-birefringence section includes the optical source, and associated couplers and detectors. The arrangement minimizes polarization fading and polarization non-reciprocity (PNR) bias error while allowing maximum use of lower cost and, in many cases, more durable, components to minimize overall system cost without loss of performance.

REFERENCES:
patent: 4046848 (1991-09-01), Udd
patent: 4547072 (1985-10-01), Yoshida et al.
patent: 4588296 (1986-05-01), Cahill et al.
patent: 4915503 (1990-04-01), Pavlath
patent: 5018859 (1991-05-01), Chang et al.
patent: 5106193 (1992-04-01), Fesler et al.

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