Optical signal noise reduction for fiber optic gyroscopses

Details Optical signal noise reduction for fiber optic gyroscopses Optical signal noise reduction for fiber optic gyroscopses

1997-02-14

1999-04-27

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 912

Patent

active

058984968

ABSTRACT:
The RIN (random intensity noise) component of the random walk error of a fiber optic gyroscope can be reduced by utilizing an unpolarized light signal during processing. By depolarizing the light wave modulated by the fiber optic sensing coil or combining it with the unmodulated light wave of orthogonal polarization, a 3 db reduction in RIN can be achieved.

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K. Iwatsuki; Excess Noise Reduction in Fiber Gyroscope Using Broader Spectrum Linewidth Er-Doped Superfluorescent Fiber Laser; IEEE Photonics Technology Letters ; ; vol. 3, No. 3 Mar. 1991; pp. 281-283.
Aileen M. Yurek, et al.; Quantum Noise in Superluminescent Diodes; IEEE Journal of Quantum Electronics; vol. QE-22, No. 4; Apr. 1986; pp. 522-527.
Henry F. Taylor; Intensity Noise and Spontaneous Emission Coupling in Superluminescent Light Sources; IEEE Journal of Quantum Electronics, vol. 26, No. 1; Jan. 1990; pp. 94-97.
R. P. Moeller et al.; 1.06-.mu.m all-fiber gyroscope with noise subtraction; Reprint from Optics Letters; vol. 16, Jul. 24, 1991; Dec. 1, 1991; pp. 1902-1904.

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