A new method for high-bandwidth servo control of the power ratio between two Raman beams for cold atom interferometer

2020 ◽  
Vol 91 (10) ◽  
pp. 103109
Author(s):  
Yaning Wang ◽  
Huankai Zhang ◽  
Dongyang Xu ◽  
Shuhua Yan ◽  
Qixue Li ◽  
...  
Keyword(s):  
Cold Atom ◽  
Atom Interferometer ◽  
Servo Control ◽  
New Method ◽  
Power Ratio ◽  
High Bandwidth

Demonstration of a Sagnac-Type Cold Atom Interferometer with Stimulated Raman Transitions

2007 ◽  
Vol 24 (1) ◽  
pp. 27-30 ◽  
Author(s):  
Wang Ping ◽  
Li Run-Bing ◽  
Yan Hui ◽  
Wang Jin ◽  
Zhan Ming-Sheng
Keyword(s):  
Cold Atom ◽  
Atom Interferometer ◽  
Raman Transitions ◽  
Stimulated Raman

scholarly journals Straight macroscopic magnetic guide for cold atom interferometer

2010 ◽  
Vol 108 (9) ◽  
pp. 094904 ◽  
Author(s):  
Alexey Tonyushkin ◽  
Mara Prentiss
Keyword(s):  
Cold Atom ◽  
Atom Interferometer

Rapid extraction of the phase shift of the cold-atom interferometer via phase demodulation

2015 ◽  
Vol 24 (11) ◽  
pp. 113704 ◽  
Author(s):  
Bing Cheng ◽  
Zhao-Ying Wang ◽  
Ao-Peng Xu ◽  
Qi-Yu Wang ◽  
Qiang Lin
Keyword(s):  
Phase Shift ◽  
Cold Atom ◽  
Atom Interferometer ◽  
Rapid Extraction ◽  
Phase Demodulation

scholarly journals A Cold-Atom Interferometer with Microfabricated Gratings and a Single Seed Laser

2021 ◽  
Author(s):  
Jongmin Lee ◽  
Roger Ding ◽  
Justin Christensen ◽  
Randy Rosenthal ◽  
Aaron Ison ◽  
...  
Keyword(s):  
System Architecture ◽  
Vibration Isolation ◽  
Laser System ◽  
Cold Atom ◽  
Atom Interferometer ◽  
Atomic Coherence ◽  
Seed Laser ◽  
Sensor Head ◽  
Single Seed ◽  
Vacuum Package

Abstract The extreme miniaturization of a cold-atom interferometer accelerometer requires the development of novel technologies and architectures for the interferometer subsystems. We describe several component technologies and a laser system architecture to enable a path to such miniaturization. We developed a custom, compact titanium vacuum package containing a microfabricated grating chip for a tetrahedral grating magneto-optical trap (GMOT) using a single cooling beam. The vacuum package is integrated into the optomechanical design of a compact cold-atom sensor head with fixed optical components. In addition, a multichannel laser system driven by a single seed laser has been implemented with time-multiplexed frequency shifting using single sideband modulators, reducing the number of optical channels connected to the sensor head. This laser system architecture is compatible with a highly miniaturized photonic integrated circuit approach, and by demonstrating atom-interferometer operation with this laser system, we show feasibility for the integrated photonic approach. In the compact sensor head, sub-Doppler cooling in the GMOT produces 15 μK temperatures, which can operate at a 20 Hz data rate for the atom interferometer sequence. After validating atomic coherence with Ramsey interferometry, we demonstrate a light-pulse atom interferometer in a gravimeter configuration without vibration isolation for 10 Hz measurement cycle rate and T = 0 - 4.5 ms interrogation time, resulting in Δg/g = 2.0e-6. All these efforts demonstrate progress towards deployable cold-atom inertial sensors under large amplitude motional dynamics.

Gravity detection by cold atom interferometer

2017 ◽  
Author(s):  
Nan Li ◽  
Zhouxiang Xu ◽  
Hao Ying ◽  
Kaikai Huang ◽  
Xuanhui Lu
Keyword(s):  
Cold Atom ◽  
Atom Interferometer

The space-wise approach for cold-atom interferometry geodetic data analysis: the MOCASS study

2020 ◽  
Author(s):  
Federica Migliaccio ◽  
Mirko Reguzzoni ◽  
Khulan Batsukh
Keyword(s):  
Data Analysis ◽  
Hydrological Cycle ◽  
Cold Atom ◽  
Atom Interferometer ◽  
Geodetic Data ◽  
Gravity Models ◽  
Relative Mass ◽  
Gravity Gradient ◽  
Gravity Gradients ◽  
The Earth

<p>In recent years, an innovative mission concept has been proposed for gravity measurements with the aim of continuously monitoring the Earth gravity and its changes. The concept is based on a satellite-borne interferometer exploiting ultra-cold atom technology. Among other studies, a team of researchers from Italian universities and research institutions proposed and carried out the MOCASS project, to investigate the performance of a cold atom interferometer flying on a low Earth orbiter and its impact on the modeling of different geophysical phenomena.</p><p>In this study, the basic idea was that of a GOCE follow-on mission, with a unique spacecraft carrying an instrument capable of measuring functionals of the Earth gravitational potential. The geodetic data analysis of the gravity gradient data attainable by such a mission was carried out following the space-wise approach developed at Politecnico di Milano. The mathematical model for the processing of the MOCASS data was formulated, including the filtering strategy applied to take into account the cold atom interferometer transfer function. Numerical simulations were performed, with different configurations of the satellite orbit and pointing mode of the interferometer; data were simulated for two cases: (i) a single-arm gradiometer observing T<sub>xx</sub> or T<sub>yy</sub> or T<sub>zz </sub>gradients; (ii) a double-arm gradiometer observing T<sub>xx </sub>and T<sub>zz </sub>gradients or T<sub>yy </sub>and T<sub>zz</sub> gradients. The results of the simulations will be illustrated, showing the applicability of the proposed concept and the neat improvement in modeling the static gravity field with respect to GOCE.</p><p>Moreover, a new study called MOCAST+ has been lately started proposing an enhanced cold atom interferometer which can deliver not only gravity gradients but also time measurements. The study will investigate whether this could give the possibility of improving the estimation of gravity models even at low harmonic degrees, with inherent advantages in the modeling of mass transport and its global variations: this will represent fundamental information, e.g. in the study of variations in the hydrological cycle and relative mass exchange between atmosphere, oceans, cryosphere and solid Earth.</p>

Optimization design of two-dimensional magneto optical trap field coils for cold atom interferometer

2016 ◽  
Vol 45 (6) ◽  
pp. 0618003
Author(s):  
樊鹏格 Fan Pengge ◽  
吴易明 Wu Yiming ◽  
贾森 Jia Sen ◽  
王先华 Wang Xianhua
Keyword(s):  
Optimization Design ◽  
Optical Trap ◽  
Cold Atom ◽  
Atom Interferometer ◽  
Magneto Optical Trap ◽  
Two Dimensional ◽  
Trap Field

A New Method for Source Number Detection Based on Peak-to-average Power Ratio

2011 ◽  
Vol 33 (7) ◽  
pp. 1589-1593 ◽  
Author(s):  
Ya-meng Jiao ◽  
Jian-guo Huang ◽  
Yun-shan Hou
Keyword(s):  
Average Power ◽  
New Method ◽  
Power Ratio ◽  
Source Number
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