基于偏振模式转换的声光陀螺研究  

Research of Acousto-Optical Gyroscope Based on Polarization-Mode Conversion

作　　者：路书祥[1] 陈淑芬[1] 付雷[1] 邹正锋[1] 孟彦彬[1] 

机构地区：[1]北京理工大学光电学院,北京100081

出　　处：《光学学报》2012年第3期85-89,共5页Acta Optica Sinica

基　　金：北京理工大学研究生科技创新基金(GA200801)资助课题

摘　　要：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 type of acousto-optic gyroscope based on polarization-mode conversion is presented, the principle and structure is analyzed and some tests of the gyroscope are carried out. The sensitivity of sensor is also given. The statical result shows that the coupling efficient is 80.02 % when the length of acousto-optic interaction is 15 mm, the input electrical power of surface acoustic wave （SAW） is 100 mW and the frequency of SAW is 168. 201 MHz. A linear voltage-rotation response curve of the gyroscope is obtained when rotating, and the sensitivity is 1 mV/E（Du3）/s. Acousto-optic gyroscope based on polarization-mode conversion keeps the advantage of SAW gyroscope, and the sensitivity is enhanced greatly.

关 键 词：陀螺 声光耦合 偏振 声表面波 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]