微光学陀螺双频率调制理论与实验研究

对微光学陀螺双频率调制中需要极高调制频率差的问题.提出了一种基于三角波的双频率调制技术.解决了双频率锯齿波调制的回扫时间问题以及数字波形中的台阶效应;指出了不同检测范围和检测精度对应于不同的调制信号频率差;确定了产生特定调制频差的三角波信号波形参数的选取及其实现方法;指明了三角波斜率转折点对调制结果的影响,并提出该问题的解决方法.采用自由谱线宽度1.61 GHz、本征谱线宽度30.1 MHz的集成光学谐振腔陀螺进行实验,完成静态双光路锁定,验证了三角波调制的可行性和优越性.

Research on the theory and experiment of double-frequency modulation for MOG

To solve the problem of sky-high modulation frequency requirement in MOG (Micro-Optical Gyroscope), a new double-frequency modulation technology based on triangular wave was proposed. The problems of regression time in sawtooth double-frequency modulation wave and the step effect in digital modulation wave were settled. Different detection range and precision correspond to different modulation frequency. The selection of triangular wave parameters and its implement methods were ensured. The affect of the triangular wave turning point was analyzed, and the way to solve was put forward. Finally, the experiment based on integrated optical resonator was accomplished. The FSR (Free Spectral Range) of the resonator is 1.61GHz, when its FWHM (Full Width at Half Maximum) is 30.1MHz. The feasibility and superiority of the triangular modulation is validated.