谐振腔光纤陀螺相位调制复位误差影响的研究

对数字相位斜波调制中2π复位误差对谐振腔光纤陀螺（R-FOG）的影响进行了研究.结果表明,相位复位误差将会导致R-FOG输出光强信号的波动,光强波动周期等于相位斜波复位周期.反射输出光强的波动在相位斜波的前后半周期明显不同,前后半周期输出光强平均值的差异与复位误差的大小和方向相关.提出了一种相位调制复位误差的消除方法,利用前后半周期平均光强差作误差信号,反馈控制相位调制通道增益,可实现复位误差的消除.

Study on the Influence of Phase Reset Error on Resonator Fiber Optic Gyroscope

The influence of 2π reset error in digital phase ramp on resonator fiber optic gyroscope (R-FOG) was studied.The theoretical analysis shows that the phase rest error results in the fluctuation of output light intensity of R-FOG and the fluctuation cycle of light intensity is equal to the reset cycle of phase ramp.It also shows that the behavior of intensity fluctuation in fore and rear half period of phase ramp differs greatly,and the difference of intensity average value between the two half periods is related with the phase reset error.A method for phase reset error reduction was proposed,which uses the difference of intensity average value as a error signal to feedback control the gain of phase modulate channel and reduce the phase reset error as a result.