Laser cooling and trapping of ytterbium atoms

Xu, Xiaojun; Wang, Wenli; Zhou, Quan; Li, Guohui; Jiang, Hailing; Chen, Linfang; Ye, Jie; Zhou, Zhihong; Yin, Chengqing; Tang, Hai-Yao; Zhou, Min

doi:10.1007/s11467-009-0033-7

Cited by 13 publications

(12 citation statements)

References 11 publications

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“…As a detailed description of the cooling and trapping system is presented elsewhere 30 , 41 – 43 , a brief description is given here. Initially, thermal ytterbium atoms effuse from the heated oven followed by two collimators with a separation of 12 cm and diameters of 3 and 6 mm.…”

Section: Methodsmentioning

confidence: 99%

Systematic evaluation of a 171Yb optical clock by synchronous comparison between two lattice systems

Gao

Zhou

Han

et al. 2018

Sci Rep

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Optical clocks are the most precise measurement devices. Here we experimentally characterize one such clock based on the 1S0-3P0 transition of neutral 171Yb atoms confined in an optical lattice. Given that the systematic evaluation using an interleaved stabilization scheme is unable to avoid noise from the clock laser, synchronous comparisons against a second 171Yb lattice system were implemented to accelerate the evaluation. The fractional instability of one clock falls below 4 × 10−17 after an averaging over a time of 5,000 seconds. The systematic frequency shifts were corrected with a total uncertainty of 1.7 × 10−16. The lattice polarizability shift currently contributes the largest source. This work paves the way to measuring the absolute clock transition frequency relative to the primary Cs standard or against the International System of Units (SI) second.

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Section: Methodsmentioning

confidence: 99%

Systematic evaluation of a 171Yb optical clock by synchronous comparison between two lattice systems

Gao

Zhou

Han

et al. 2018

Sci Rep

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“…The spectrum is logged by the normalized detection with the repumping lasers on the transition at 649 nm and the transition at 770 nm. More details and the experimental setup can be found in our previous works 27 , 39 – 41 . The maximum of the lattice laser power is about 2.5 W and the power is stabilized by using an acousto-optic modulator (AOM).…”

Section: Methodsmentioning

confidence: 99%

Carrier thermometry of cold ytterbium atoms in an optical lattice clock

Han

Zhou

Zhang

et al. 2018

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The ultracold atomic gas serving as the quantum reference is a key part of an optical lattice clock, and the temperature of atoms in the optical lattice affects the uncertainty and instability of the optical lattice clocks. Since the carrier spectrum of the clock transition in the lattices reflects the thermal dynamics of cold atoms, the temperature of atoms can be extracted from the carrier spectrum in a non-magic wavelength lattice of ytterbium optical clocks. Furthermore, the temperatures obtained from the carrier spectra are in good agreement with the results obtained by the time-of-flight method and thermometry based on the sideband spectrum. In addition, the heating effects caused by the lattice laser are studied on the basis of the sample temperatures.

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“…The isotope separation efficiency and atomic flux could be increased by taking the following measures: (i) further compressing the divergence of the atomic beam by using a two-dimensional optical molasses (2D-OM) perpendicular to the atomic beam; (ii) reducing the longitudinal velocity by using a Zeeman slower or a similar technology; (iii) adding another Zeeman slower. [29,30] the beam collimato improve the separation efficiency and purity by combining with the Zeeman slowing and 2D-OM techniques. Our theoretical calculations confirm the experimental results presented in Ref.…”

Section: Improvement In Separation Efficiencymentioning

confidence: 99%

Theoretical study on isotope separation of an ytterbium atomic beam by laser deflection

Zhou¹,

Xu²

2014

Chinese Phys. B

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Isotope separation by laser deflecting an atomic beam is analyzed theoretically. Interacting with a tilted onedimensional optical molasses, an ytterbium atomic beam is split into multi-beams with different isotopes like 172 Yb, 173 Yb, and 174 Yb. By using the numerical calculation, the dependences of the splitting angle on the molasses laser intensity and detuning are studied, and the optimal parameters for the isotope separation are also investigated. Furthermore, the isotope separation efficiency and purity are estimated. Finally a new scheme for the efficient isotope separation is proposed. These findings will give a guideline for simply obtaining pure isotopes of various elements.

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Laser cooling and trapping of ytterbium atoms

Cited by 13 publications

References 11 publications

Systematic evaluation of a 171Yb optical clock by synchronous comparison between two lattice systems

Systematic evaluation of a 171Yb optical clock by synchronous comparison between two lattice systems

Carrier thermometry of cold ytterbium atoms in an optical lattice clock

Theoretical study on isotope separation of an ytterbium atomic beam by laser deflection

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