中国物理B ›› 2018, Vol. 27 ›› Issue (7): 70203-070203.doi: 10.1088/1674-1056/27/7/070203

• GENERAL • 上一篇    下一篇

A new ellipse fitting method of the minimum differential-mode noise in the atom interference gravimeter

Aopeng Xu(许翱鹏), Zhaoying Wang(王兆英), Delong Kong(孔德龙), Zhijie Fu(付志杰), Qiang Lin(林强)   

  1. 1 Institute of Optics, Department of Physics, Zhejiang University, Hangzhou 310027, China;
    2 Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou 310023, China
  • 收稿日期:2018-02-05 修回日期:2018-05-03 出版日期:2018-07-05 发布日期:2018-07-05
  • 通讯作者: Zhaoying Wang E-mail:zhaoyingwang@zju.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFC0601602) and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2017FZA3005 and 2018FZA3005).

A new ellipse fitting method of the minimum differential-mode noise in the atom interference gravimeter

Aopeng Xu(许翱鹏)1, Zhaoying Wang(王兆英)1, Delong Kong(孔德龙)1, Zhijie Fu(付志杰)1, Qiang Lin(林强)2   

  1. 1 Institute of Optics, Department of Physics, Zhejiang University, Hangzhou 310027, China;
    2 Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou 310023, China
  • Received:2018-02-05 Revised:2018-05-03 Online:2018-07-05 Published:2018-07-05
  • Contact: Zhaoying Wang E-mail:zhaoyingwang@zju.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFC0601602) and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2017FZA3005 and 2018FZA3005).

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摘要： Ellipse fitting is a useful tool to obtain the differential signal of two atom interference gravimeters. The quality standard of ellipse fitting should be the deviation between the true phase and the fitting phase of the interference fringe. In this paper, we present a new algorithm to fit the ellipse. The algorithm is to minimize the differential noise of two interference gravimeters and obtain a more accurate value of the gravity gradient. We have theoretically derived the expression of the differential-mode noise and implemented the ellipse fitting in the program. This new algorithm is also compared with the classical methods.

关键词: ellipse fitting, atom interference, gravity measurement

Abstract: Ellipse fitting is a useful tool to obtain the differential signal of two atom interference gravimeters. The quality standard of ellipse fitting should be the deviation between the true phase and the fitting phase of the interference fringe. In this paper, we present a new algorithm to fit the ellipse. The algorithm is to minimize the differential noise of two interference gravimeters and obtain a more accurate value of the gravity gradient. We have theoretically derived the expression of the differential-mode noise and implemented the ellipse fitting in the program. This new algorithm is also compared with the classical methods.

Key words: ellipse fitting, atom interference, gravity measurement

中图分类号:  (Interpolation; curve fitting)

  • 02.60.Ed
42.50.-p (Quantum optics)