Optical interference angular velocity meter
作者： Eiichi Asami
DOI:
关键词: Spectrum analyzer 、 Optoelectronics 、 Electromagnetic coil 、 Polarizer 、 Interference (wave propagation) 、 Angular velocity 、 Phase modulation 、 Optical modulator 、 Physics 、 Optical fiber 、 Optics
摘要: A ray of light from a source (11) passes through branching device (25) having ratio 1:4 and further polarizer (13) is incident into another (14). Two branched rays the (14) pass phase modulators (15, 26) at both ends an optical fiber coil (16) are as right-turn left-turn light, respectively. The phase-modulated by modulating signal φ (2τfmt) in modulator (15) (2πfmt - 2πτfm) (where τ : propagation time (16)) (26). Both passing enter interfere with each other, interference supplied to analyzer (21) (25). output subjected synchronous detection signal. Therefore, angular velocity applied around axis detected. frequency fm component removed intensity-modulated occuring 26), error bias value meter eliminated, zero-point stability can be improved.
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