Optical fiber gyroscope

Details Optical fiber gyroscope Optical fiber gyroscope

1985-05-06

1988-01-19

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902, G01C 1964

Patent

active

047201932

ABSTRACT:
An improved optical fiber gyroscope is provided to determine the angular velocity of an optical system. A beam of light emitted from a coherent light source are split into first and second light components. The first light component is further split into third and fourth light components while the second light component is further split into fifth and sixth components. The third and fifth light components are passed through a coil-like optical fiber in opposite directions to each other while the fourth and sixth light components are passed through an optical modulator in opposite directions to each other. The third and fourth light components are made to be interfered in a photodetector while the fifth and sixth light components are made to be interfered in another photodetector. From the outputs of the photodetectors, the above angular velocity is determined.

REFERENCES:
"Optical Fibre Gyroscope Using a Coherent Source", Giles et al.; Conference: Colloquium on Optical Fibre Sensors, (1982) London, England (26 May, 1982), pp. 8/1-8/4.
"Technical Material Collection on Optical Fiber Sensors (Hikari-fiber Sensor Gijutu Shiryo-Shu)", p. 263, issued Aug. 19, 1983, Diichi International K.K.

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