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提出一种基于偏振模式转换的声光陀螺,分析其原理与结构并对该陀螺进行实验测试。静态测试结果表明,当声光作用长度为15mm,声表面波输入功率为100mW,频率为168.201MHz时,偏振模式转化效率为80.02%。在偏置条件下进行旋转测试,得到输出电压随陀螺转速呈线性变化的曲线,其灵敏度约为1mV/[(°)/s]。偏振型声光陀螺保留声表面波陀螺体积小、成本低等优点,而在灵敏度上有大幅提高。
A polarization-mode-switched acoustooptic gyroscope is proposed, whose principle and structure are analyzed and the gyroscope is tested experimentally. Static test results show that the polarization mode conversion efficiency is 80.02% when the acousto-optic length is 15mm, the input power of SAW is 100mW and the frequency is 168.201MHz. Under the bias condition, the rotation test is performed to obtain the curve that the output voltage varies linearly with the gyroscope speed, and the sensitivity is about 1mV / [(°) / s]. Polarization-type acousto-optic gyroscope SAW gyro retained small size, low cost, etc., while greatly increased the sensitivity.