中国物理B ›› 2020, Vol. 29 ›› Issue (7): 70601-070601.doi: 10.1088/1674-1056/ab8885
所属专题： SPECIAL TOPIC — Ultracold atom and its application in precision measurement
Michelson laser interferometer-based vibration noise contribution measurement method for cold atom interferometry gravimeter
Ning Zhang(张宁), Qingqing Hu(胡青青), Qian Wang(王倩), Qingchen Ji(姬清晨), Weijing Zhao(赵伟靖), Rong Wei(魏荣), Yuzhu Wang(王育竹)
- 1 Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Advanced Interdisciplinary Technology Research Center, National Innovation Institute of Defense Technology, Beijing 100010, China;
4 Department of Physics, Shanghai University, Shanghai 201800, China
Michelson laser interferometer-based vibration noise contribution measurement method for cold atom interferometry gravimeter
Ning Zhang(张宁)1,2, Qingqing Hu(胡青青)3, Qian Wang(王倩)1,2, Qingchen Ji(姬清晨)1,4, Weijing Zhao(赵伟靖)1,2, Rong Wei(魏荣)1, Yuzhu Wang(王育竹)1
- 1 Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Advanced Interdisciplinary Technology Research Center, National Innovation Institute of Defense Technology, Beijing 100010, China;
4 Department of Physics, Shanghai University, Shanghai 201800, China
摘要： The measurement performance of the atom interferometry absolute gravimeter is strongly affected by the ground vibration noise. We propose a vibration noise evaluation scheme using a Michelson laser interferometer constructed by the intrinsic Raman laser of the atomic gravimeter. Theoretical analysis shows that the vibration phase measurement accuracy is better than 4 mrad, which corresponds to about 10-10 g accuracy for a single shot gravity measurement. Compared with the commercial seismometer or accelerometer, this method is a simple, low cost, direct, and fully synchronized measurement of the vibration phase which should benefit the development of the atomic gravimeter. On the other side, limited by equivalence principle, the result of the laser interferometer is not absolute but relative vibration measurement. Triangular cap method could be used to evaluation the noise contribution of vibration, which is a different method from others and should benefit the development of the atomic gravimeter.
中图分类号: (Spatial dimensions)
- 06.30.Bp