拉曼光反射镜隔振平台设计及性能测试

Design and performance testing for a vibration isolator of Raman retro-reflection mirror

为提高原子干涉重力仪拉曼光相位稳定性,降低拉曼光反射镜振动噪声对原子干涉仪测量精度的影响,设计并研制了一种适用于小型化原子干涉重力仪拉曼光反射镜隔振平台。通过COMSOL Multiphysics有限元分析和激光干涉仪测试验证了其隔振性能。根据原子干涉重力仪对噪声控制的要求,对隔振平台在60~200 Hz内的减振效果进行仿真,将仿真结果作为试验的指导,用扫描式激光干涉仪配合标准振动台,对装载到隔振平台上的拉曼光反射镜的振动进行了测试,结果符合仿真结论。

Here,in order to improve Raman light phase stability of an atomic interference gravimeter and reduce effects of Raman retro-reflection mirror’s vibration noise on measurement accuracy of the atomic interference gravimeter,a vibration isolator for small type atomic interference gravimeter’s Raman retro-reflection mirror was designed and fabricated.Its vibration isolation performance was verified using COMSOL Multiphysics finite element analysis and laser interferometer tests.According to the requirements of atomic interference gravimeter for noise control,the vibration reduction effect of the vibration isolator within the range of 60-200 Hz was simulated.Taking the simulation results as the test guide,a scanning laser interferometer and a standard shaking table were used to measure vibration of a Raman retro-reflector loaded on the vibration isolator,the measurement results agreed well with the simulated ones.