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Observation of Spin Polarized Clock Transition in 87Sr Optical Lattice Clock

Qiang Wang, 林弋戈, 李烨 +5 more

Chinese Physics LettersJan 1, 20140 citations

Non-destructive detection of trapped 87Sr atoms in an optical clock

B. X. R. Alves, William Moreno, Yannick Foucault +2 more

Oct 1, 20190 citations

Non-destructive detection in 87Sr optical lattice clocks

B. X. R. Alves, William Moreno, Yannick Foucault +2 more

Jan 1, 20200 citations

Superradiance on the mHz linewidth clock transition in 87Sr

Matthew A. Norcia, Matthew N. Winchester, Julia Cline +1 more

Bulletin of the American Physical SocietyMay 26, 20160 citations

Measurement of the probe Stark shift of the 87Sr optical lattice clock using the frequency modulation spectroscopy

Qinfang Xu, Xiaotong Lu, Jingjing Xia +2 more

With the uncertainty of the optical clocks improving to the order of 10-18, the probe light used to detect the clock transition has demonstrated nonnegligible Stark shift, provoking to precisely evaluate this shift. Here, we demonstrate a frequency modulation technique to realize a large measurement lever arm of the probe Stark shift with no cost of the measurement accuracy of the interleaved stabilization method. This frequency-modulated spectrum is theoretical described and experimental verified. The probe Stark shift coefficient of the 87Sr optical lattice clock is experimentally determined as -(45.97+/-3.51) Hz/(W/cm2) using this frequency modulation spectroscopy.With the uncertainty of the optical clocks improving to the order of 10-18, the probe light used to detect the clock transition has demonstrated nonnegligible Stark shift, provoking to precisely evaluate this shift. Here, we demonstrate a frequency modulation technique to realize a large measurement lever arm of the probe Stark shift with no cost of the measurement accuracy of the interleaved stabilization method. This frequency-modulated spectrum is theoretical described and experimental verified. The probe Stark shift coefficient of the 87Sr optical lattice clock is experimentally determined as -(45.97+/-3.51) Hz/(W/cm2) using this frequency modulation spectroscopy.

arXiv:2105.10401May 21, 20210 citations

Compact Microcontroller-Based Control System for Transportable Lattice Optical Clocks

Anastasia V. Semenko, Anton P. Vyalykh, Danil A. Paryohin +1 more

In this paper, we present description and characteristics of a compact control system for the transportable optical lattice clocks. The hardware of this system is based on the STM32 microcontroller and the software with a graphical interface implemented by the Python software language. The control system has more than twenty digital outputs, ten analog outputs and the ability to connect the additional modules. This system provides the generation of the digital signals with a time resolution of 10 μs with a high synchronization accuracy when the digital-to-analog converter operates simultaneously with digital signals. We compared our custom the microcontroller-based system with the commercial Real-Time National Instruments system, which is often used in experiments with ultracold atoms. Experiments have shown that using both systems allows to cool 87Sr atoms to a temperature of ∼14 μK. This is enough to load the atoms into an optical lattice and to perform the clock transition spectroscopy.In this paper, we present description and characteristics of a compact control system for the transportable optical lattice clocks. The hardware of this system is based on the STM32 microcontroller and the software with a graphical interface implemented by the Python software language. The control system has more than twenty digital outputs, ten analog outputs and the ability to connect the additional modules. This system provides the generation of the digital signals with a time resolution of 10 μs with a high synchronization accuracy when the digital-to-analog converter operates simultaneously with digital signals. We compared our custom the microcontroller-based system with the commercial Real-Time National Instruments system, which is often used in experiments with ultracold atoms. Experiments have shown that using both systems allows to cool 87Sr atoms to a temperature of ∼14 μK. This is enough to load the atoms into an optical lattice and to perform the clock transition spectroscopy.

International Conference on Digital Signal Processing and its Applications (DSPA)Mar 27, 20241 citation

System Development and Clock Transition Spectroscopy Detection of Transportable 87Sr Optical Clock

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