Note: Directly measuring the direct digital synthesizer frequency chirp-rate for an atom interferometer

Juan Juan Tao; Min Kang Zhou; Qiao Zhen Zhang; Jia Feng Cui; Xiao Chun Duan; Cheng Gang Shao; Zhong Kun Hu

doi:10.1063/1.4930562

Note: Directly measuring the direct digital synthesizer frequency chirp-rate for an atom interferometer

Juan Juan Tao, Min Kang Zhou, Qiao Zhen Zhang, Jia Feng Cui, Xiao Chun Duan, Cheng Gang Shao, Zhong Kun Hu

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

During gravity measurements with Raman type atom interferometry, the frequency of the laser used to drive Raman transition is scanned by chirping the frequency of a direct digital synthesizer (DDS), and the local gravity is determined by precisely measuring the chip rate α of DDS. We present an effective method that can directly evaluate the frequency chirp rate stability of our DDS. By mixing a pair of synchronous linear sweeping signals, the chirp rate fluctuation is precisely measured with a frequency counter. The measurement result shows that the relative α instability can reach 5.7 × 10^-11 in 1 s, which is neglectable in a 10^-9 g level atom interferometry gravimeter.

Original language	English
Article number	096108
Journal	Review of Scientific Instruments
Volume	86
Issue number	9
DOIs	https://doi.org/10.1063/1.4930562
State	Published - Sep 1 2015
Externally published	Yes

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title = "Note: Directly measuring the direct digital synthesizer frequency chirp-rate for an atom interferometer",

abstract = "During gravity measurements with Raman type atom interferometry, the frequency of the laser used to drive Raman transition is scanned by chirping the frequency of a direct digital synthesizer (DDS), and the local gravity is determined by precisely measuring the chip rate α of DDS. We present an effective method that can directly evaluate the frequency chirp rate stability of our DDS. By mixing a pair of synchronous linear sweeping signals, the chirp rate fluctuation is precisely measured with a frequency counter. The measurement result shows that the relative α instability can reach 5.7 × 10-11 in 1 s, which is neglectable in a 10-9 g level atom interferometry gravimeter.",

author = "Tao, {Juan Juan} and Zhou, {Min Kang} and Zhang, {Qiao Zhen} and Cui, {Jia Feng} and Duan, {Xiao Chun} and Shao, {Cheng Gang} and Hu, {Zhong Kun}",

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doi = "10.1063/1.4930562",

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T2 - Directly measuring the direct digital synthesizer frequency chirp-rate for an atom interferometer

AU - Tao, Juan Juan

AU - Zhou, Min Kang

AU - Zhang, Qiao Zhen

AU - Cui, Jia Feng

AU - Duan, Xiao Chun

AU - Shao, Cheng Gang

AU - Hu, Zhong Kun

PY - 2015/9/1

Y1 - 2015/9/1

N2 - During gravity measurements with Raman type atom interferometry, the frequency of the laser used to drive Raman transition is scanned by chirping the frequency of a direct digital synthesizer (DDS), and the local gravity is determined by precisely measuring the chip rate α of DDS. We present an effective method that can directly evaluate the frequency chirp rate stability of our DDS. By mixing a pair of synchronous linear sweeping signals, the chirp rate fluctuation is precisely measured with a frequency counter. The measurement result shows that the relative α instability can reach 5.7 × 10-11 in 1 s, which is neglectable in a 10-9 g level atom interferometry gravimeter.

AB - During gravity measurements with Raman type atom interferometry, the frequency of the laser used to drive Raman transition is scanned by chirping the frequency of a direct digital synthesizer (DDS), and the local gravity is determined by precisely measuring the chip rate α of DDS. We present an effective method that can directly evaluate the frequency chirp rate stability of our DDS. By mixing a pair of synchronous linear sweeping signals, the chirp rate fluctuation is precisely measured with a frequency counter. The measurement result shows that the relative α instability can reach 5.7 × 10-11 in 1 s, which is neglectable in a 10-9 g level atom interferometry gravimeter.

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VL - 86

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 9

M1 - 096108

ER -

Note: Directly measuring the direct digital synthesizer frequency chirp-rate for an atom interferometer

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