New Method for Cold Atom Number Stabilization in Integrating Sphere Cold Atom Clock

2017 ◽  
Vol 37 (8) ◽  
pp. 0802001
Author(s):  
王秀梅 Wang Xiumei ◽  
李 琳 Li Lin ◽  
孟艳玲 Meng Yanling ◽  
王亚宁 Wang Yaning ◽  
于明圆 Yu Mingyuan ◽  
...  
Keyword(s):  
Cold Atom ◽  
New Method ◽  
Integrating Sphere ◽  
Atom Number

A large-scale cold atom source in an integrating sphere

2014 ◽  
Vol 28 (14) ◽  
pp. 1450116 ◽  
Author(s):  
Ben-Chang Zheng ◽  
Hua-Dong Cheng ◽  
Yan-Ling Meng ◽  
Peng Liu ◽  
Xiu-Mei Wang ◽  
...  
Keyword(s):  
Large Scale ◽  
Cold Atoms ◽  
Signal To Noise Ratio ◽  
Atomic Clock ◽  
Cold Atom ◽  
Integrating Sphere ◽  
Cooling Power ◽  
Atom Number ◽  
Atom Source ◽  
Good Signal

An integrating sphere with a diameter of 10 cm is developed for cooling atoms. The maximum number of 2 × 1010 cold atoms is obtained from a background vapor with 220 mW cooling laser power. The cold atom number can be increased by further increasing the cooling power. Such cold atom source would have potential use for Raman–Ramsey atomic clock with good signal-to-noise ratio (SNR).

Frequency and Intensity Noises of Probe Laser in Integrating Sphere Cold Atom Clock

2017 ◽  
Vol 44 (9) ◽  
pp. 0912001
Author(s):  
王秀梅 Wang Xiumei ◽  
孟艳玲 Meng Yanling ◽  
李 琳 Li Lin ◽  
王亚宁 Wang Yaning ◽  
于明圆 Yu Mingyuan ◽  
...  
Keyword(s):  
Cold Atom ◽  
Probe Laser ◽  
Integrating Sphere

Reaching a few 10-15 long-term stability of integrating sphere cold atom clock

2018 ◽  
Vol 16 (7) ◽  
pp. 070201 ◽  
Author(s):  
Yaning Wang Yaning Wang ◽  
Yanling Meng Yanling Meng ◽  
Jinyin Wan Jinyin Wan ◽  
Ling Xiao Ling Xiao ◽  
Mingyuan Yu Mingyuan Yu ◽  
...  
Keyword(s):  
Cold Atom ◽  
Integrating Sphere ◽  
Term Stability ◽  
Long Term Stability

Atom number calibration in absorption imaging at very small atom numbers

Open Physics ◽  
2012 ◽  
Vol 10 (5) ◽  
Author(s):  
Gregory Konstantinidis ◽  
Melina Pappa ◽  
Gustav Wikström ◽  
Paul Condylis ◽  
Daniel Sahagun ◽  
...  
Keyword(s):  
Fluorescence Imaging ◽  
Optical Trap ◽  
Cold Atom ◽  
Single Atom ◽  
Absolute Calibration ◽  
Accurate Information ◽  
Atom Number ◽  
Absorption Imaging ◽  
Small Atom ◽  
Dark Ground

AbstractCold atom experiments often use images of the atom clouds as their exclusive source of experimental information. The most commonly used technique is absorption imaging, which provides accurate information about the shapes of the atom clouds, but requires care when seeking the absolute atom number for small atom samples. In this paper, we present an independent, absolute calibration of the atom numbers. We directly compare the atom number detected using dark-ground imaging to the one observed by fluorescence imaging of the same atoms in a magneto-optical trap. We normalise the signal using single-atom resolved fluorescence imaging. In order to be able to image the absorption of the very low atom numbers involved, we use diffractive dark-ground imaging as a novel, ultra-sensitive method of in situ imaging for untrapped atom clouds down to only 100 atoms. We demonstrate that the Doppler shift due to the acceleration of the atoms by the probe beam has to be taken into account when measuring the atom-number.

Development of an Integrating Sphere Cold Atom Clock

2013 ◽  
Vol 30 (12) ◽  
pp. 123701 ◽  
Author(s):  
Ben-Chang Zheng ◽  
Hua-Dong Cheng ◽  
Yan-Ling Meng ◽  
Ling Xiao ◽  
Jin-Yin Wan ◽  
...  
Keyword(s):  
Cold Atom ◽  
Integrating Sphere

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

Membrane MOT: Trapping Dense Cold Atoms in a Sub-Millimeter Diameter Hole of a Microfabricated Membrane Device

2020 ◽  
Author(s):  
Jongmin Lee ◽  
Grant Biedermann ◽  
John Mudrick ◽  
Erica Douglas ◽  
Yuan-Yu Jau
Keyword(s):  
Integrated Circuits ◽  
Cold Atoms ◽  
Optical Trap ◽  
Cold Atom ◽  
Hole Diameter ◽  
Beam Diameter ◽  
Atom Number ◽  
Diameter Hole ◽  
Doppler Cooling ◽  
Scaling Rule

Abstract We present a demonstration of keeping a cold-atom ensemble within a sub-millimeter diameter hole in a transparent membrane.Based on the effective beam diameter of the magneto-optical trap (MOT) given by the hole diameter (d = 400 μm), we measurean atom number that is 105 times higher than the predicted value using the conventional d6 scaling rule. Atoms trapped bythe membrane MOT are cooled down to 10 μK with sub-Doppler cooling. Such a device can be potentially coupled to thephotonic/electronic integrated circuits that can be fabricated in the membrane device representing a step toward the atom trapintegrated platform.

Research on Phase Modulation of Ramsey Fringes in Integrating Sphere Cold Atom Clocks

2016 ◽  
Vol 43 (11) ◽  
pp. 1112001
Author(s):  
刘 鹏 Liu Peng ◽  
成华东 Cheng Huadong ◽  
孟艳玲 Meng Yanling ◽  
万金银 Wan Jinyin ◽  
王秀梅 Wang Xiumei ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Cold Atom ◽  
Integrating Sphere
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