Triangular wave phase modulation method of resonant cavity optical fiber gyroscope and apparatus thereof
A phase modulation, fiber optic gyroscope technology, applied in measurement devices, coupling of optical waveguides, Sagnac effect gyroscopes, etc., can solve problems such as affecting system accuracy, inaccurate 2π reset height, and unfavorable signal carrier component suppression. , to achieve the effect of overcoming the influence and suppressing the noise
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[0024] As shown in Figure 1, in the triangular wave phase modulation device of the resonator fiber optic gyroscope, the laser 1 and the first coupler 2, the first phase modulator 3, the second coupler 7, the third coupler 13, and the fourth coupler 8 , the second phase modulator 4, the first coupler 2 are connected, the first phase modulator 3 is connected with the first triangular wave signal generator 5, the second phase modulator 4 is connected with the second triangular wave signal generator 6, The second coupler 7 is connected with the first photodetector 9, the first high-speed digital signal processor 11, and the laser 1, and the fourth coupler 8 is connected with the second photodetector 10 and the second high-speed digital signal processor 12. , the third coupler 13 is connected to the fiber ring 14 .
[0025] The laser light emitted by the laser (Laser) is divided into two beams by the 50% coupler C1, and the two beams are frequency-shifted by the phase modulator (Ph...
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