FIBER OPTIC GYROSCOPE

A method is disclosed which reduces wavelength ripple in a fiber optic gyroscope by suppressing, as well as reducing the effects of, whispering gallery modes generated by the gyroscope light source. The method functions to increase the radius of bends in existing curved sections of optical fiber us...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SPICER, TIMOTHY L, ANG, DICK
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BASIC ELECTRIC ELEMENTS DEVICES USING STIMULATED EMISSION ELECTRICITY GYROSCOPIC INSTRUMENTS MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SURVEYING TESTING
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Beschreibung
Zusammenfassung:	A method is disclosed which reduces wavelength ripple in a fiber optic gyroscope by suppressing, as well as reducing the effects of, whispering gallery modes generated by the gyroscope light source. The method functions to increase the radius of bends in existing curved sections of optical fiber us ed in the light source for a fiber optic gyroscope. This increase in bend radiu s effectively reduces the amount of core-to-clad-to-core reflected light, whic h in turn reduces the extent to which whispering gallery modes are generated, thereby reducing a source of wavelength ripple. Reduction of wavelength ripp le is also accomplished in the present invention by using a band rejection filt er to attenuate one of the bimodal spectral components generated by the gyrosco pe light source.