Fiber-optic gyroscope main control panel crystal oscillator selecting method based on anti-fuse FPGA
A fiber-optic gyroscope and anti-fuse technology, which is applied in Sagnac effect gyroscopes, gyroscopes/steering sensing equipment, measurement devices, etc. problem, to achieve the effect of fast adjustment speed, high real-time performance, and reduced bias error
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[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] 1. Frequency offset error analysis caused by inaccurate modulation frequency
[0024] 1.1 Analysis of the situation that the modulation frequency is equal to the eigenfrequency
[0025] The square wave modulation of the push-pull modulator is shown in the figure below. Due to LiNbO 3 The anisotropy of the crystal, the electro-optic effect is related to the direction of the electric field. When the modulation voltage V is applied between the positive pole and the negative pole m When (t), a pair of electric fields with opposite directions will be generated on the two arms of the Y branch waveguide, and the corresponding optical refractive index change Δn caused by the applied electric field is also opposite, that is, the phase change of the guided light in the two arm waveguides is also opposite. It is equivalent to applying two phase modulation sig...
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