Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1988-12-05
1990-07-31
Willis, Davis L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356351, G01B 902
Patent
active
049445910
ABSTRACT:
An optical fiber rotation sensor includes a source of coherent light and a first polarizing beam splitter for transmitting a first component of the coherent light having a first polarization direction and reflecting a second component of the coherent light having a second polarization direction orthogonal to the first polarization direction. A coiled multimode optical fiber is coupled to the first beam splitter with the first and second components propagating in the fiber in opposite directions. A polarizer transmits a linearly polarized third component containing equal contributions from the first and second components. A half-wave plate rotates the polarization of the third component by 45.degree.. A self-pumped phase conjugating element reflects a phase-conjugated fourth component such that the fourth component retraverses the half-wave plate and the polarizer, then is divided by the first polarizing beam splitter into fifth and sixth components propagating in the fiber in opposite directions. A second polarizing beam splitter transmits a seventh component having the first polarization direction and reflects an eighth component having the second polarization direction. A first detector measures the power of the seventh component, while a second detector measures the power of the eighth component, the difference being related to the angular motion of the rotation sensor.
REFERENCES:
patent: 4429393 (1984-01-01), Giuliano
patent: 4681446 (1987-07-01), Yeh
Feinberg, Self-Pumped, Continuous-Wave Phase Conjugator using Internal Reflection, Optics Letters, vol. 7, pp. 486-488 (1982).
Fischer et al., New Optical Gyroscope Based on the Ring Passive Phase Conjugator, Applied Physics Letters, vol. 47, pp. 1-3 (1985).
McMichael et al., Self-Pumped Phase-Conjugate Fiber-Optic Gyro, Optics Letters, vol. 11, pp. 686-688.
Yeh et al., Phase-Congugate Fiber-Optic Gyro, Applied Optics, vol. 25, pp. 1029-1030 (1986).
Yeh et al., Phase-Conjugate Ring Gyros and Photorefractive-Biased Ring Gyros, Optical Ring Gyros, pp. 102-109 (1984).
Deinken John J.
Rockwell International Corporation
Turner S. A.
Willis Davis L.
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