Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1984-11-01
1987-04-21
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1964
Patent
active
046592237
ABSTRACT:
An interferometric device for measuring an angular rotational speed comprising an amplifying photo refractive crystal placed in the path of optical guide means forming a closed loop. Two signal waves penetrate into said crystal so as to obtain two contrarotating waves of different optical frequencies and of amplitudes restored by amplification in the crystal, moving in said closed loop.
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patent: 3581227 (1971-05-01), Podgorski
patent: 4344706 (1982-08-01), Ljung et al.
patent: 4396290 (1983-08-01), Morris
patent: 4405236 (1983-09-01), Mitsuhashi et al.
patent: 4525843 (1985-06-01), Diels
"Techniques for Shot Noise Limited Inertial Rotation Measurment Using a Multiturn Fiber Sagnac Interferometer", Davis et al., S.P.I.E., vol. 157, 1978, pp. 131-135.
"Coherent Oscillation by Self-Induced Gratings in the Photorefractive Crystal BaTiO.sub.3 ", White et al., Applied Physics Letters, 3-1982, pp. 450-452.
"Coherent Signal Beam Amplfication in Two-Wave Mixing Experiments with Photorefractive Bi.sub.22 SiO.sub.20 Crystals", Huignard et al., Optics Communications, 8-1981, pp. 249-254.
Arditty Herve
Huignard Jean-Pierre
Puech Claude
"Thomson-CSF"
McGraw Vincent P.
Turner S. A.
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