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Polarizer requirements for fiber gyroscopes with high-birefringent fiber and broadband sources

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Optical polarization requirements were recognized early in the development of fiber-optic gyroscopes. The preferred position of the polarizer in the optical gyro circuit was given by Ulrich. 1 An analysis of the effect of an imperfect polarizer was carried out by Kintner,2 who showed that a phase bias results which is proportional to the polarizer amplitude extinction ratio. This phase bias causes an offset in the apparent rotation rate from its true value. Estimates of the required polarizer quality for specified gyroscope performance have been difficult to state largely due to the lack of a quantitative model. Experimental intensity extinction ratios reported for gyroscope polarizers range from 50 (Ref. 3) to 90 dB.4

© 1984 Optical Society of America

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