| 摘要 |
An optical-fiber gyroscope of the Sagnac type having an optical fiber coil and a 3x3 coupler comprising three optically coupled fiber optic guides. A first fiber optic guide of the 3x3 coupler is coupled at one end to a first optical radiation source, whose radiation intensity is detected directly by a radiation detector. The two other fiber optic guides of the 3x3 coupler are each coupled to respective ends of an optical fiber coil and, at the other ends of each of the two other fiber optic guides, to respective radiation detectors. The first fiber optic guide of the 3x3 coupler features a second optical radiation source, which is modulated by a frequency which differs from the modulation frequency of the first radiation source.
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