Integrated, reliable laser system for an <sup>87</sup>Rb cold atom fountain clock

Zhang, Zhen; Xiang, Jinhua; Xu, Bin; Pan, Feng; Sun, Guangwei; Meng, Yiming; Deng, Siminda; Ren, Wei; Wan, Jinyin; Lü, Desheng

doi:10.1088/1674-1056/ac9e95

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…In addition, Mechanical stability was verified in a 6.11g RMS random vibration test, where the change in output power before and after vibration was less than 5%. The experimental results of the functional verification of the laser system are shown in 10 [19].…”

Section: Research Advancesmentioning

confidence: 99%

The application and development of laser frequency stabilization techniques for atomic clocks

Liu,

Guo,

Liu

et al. 2023

6th Optics Young Scientist Summit (OYSS 2023)

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Atomic clocks are precise devices that generate time and frequency signals by exploiting the inherent oscillation frequency of atoms. They have broad applications in fields such as aerospace navigation, global positioning, and precision metrology. Laser frequency stabilization techniques are crucial for ensuring the stable operation of atomic clocks, laser frequency stability directly impacts the performance of these clocks. This review presents the working principles, characteristics, and research progress of different laser frequency stabilization techniques, including saturation absorption spectroscopy stabilization, Pound-Drever-Hall technique, and modulation transfer spectroscopy stabilization. Additionally, it provides a perspective on the future advancement of laser frequency stabilization techniques in the atomic clock filed, which integral in the development of high-performance atomic clocks.

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Section: Research Advancesmentioning

confidence: 99%

The application and development of laser frequency stabilization techniques for atomic clocks

Liu,

Guo,

Liu

et al. 2023

6th Optics Young Scientist Summit (OYSS 2023)

View full text Add to dashboard Cite

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Cold atom microwave clock based on intracavity cooling in China space station

Deng,

Ren,

Xiang

et al. 2024

npj Microgravity

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Atomic clocks with higher frequency stability and accuracy than traditional space-borne atomic clocks are the cornerstone of long-term autonomous operation of space-time-frequency systems. We proposed a space cold atoms clock based on an intracavity cooling scheme, which captures cold atoms at the center of a microwave cavity and then executes in situ interactions between the cold atoms and microwaves. As a result of the microgravity environment in space, the cold atoms can interact with the microwaves for a longer time, which aids in realizing a high-precision atomic clock in space. This paper presents the overall design, operational characteristics, and reliability test results of the space atomic clock based on the intracavity cooling scheme designed for the operation onboard the China space station. In addition, the engineering prototype performance of the space cold atoms microwave clock is also presented. The ground test results for the clock show a fractional frequency stability of 1.1 × 10−12 τ−1/2 reaching 2.5 × 10−15 at 200,000 s, providing solid technical and data support for its future operation in orbit.

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Miniaturized optical system for high-precision mobile atomic gravimeters

Zhu,

Huang,

Gao

et al. 2024

Opt. Express

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Inertial sensors utilizing cold atom interferometry are advancing toward real-world applications, necessitating optical systems with superior integration and stability. We have developed a highly integrated and stable optical system for a fountain-type 85Rb atom gravimeter, utilizing dual fiber laser outputs to generate all the laser beams. The optical system design involves bonding miniaturized optical components onto quartz glass plates, significantly reducing the volume of the optical module while maintaining high spatial laser utilization efficiency. This enables the system to be integrated into a chassis with the dimension of 43 cm × 42 cm × 13 cm. Remarkably, the system maintains its functionality without the need for adjustments even after being transported over 14,000 km. It achieves a gravity measurement sensitivity of 14.5 µGal/Hz1/2 and a long-term stability of 0.4 µGal over 2560 seconds. This versatile optical system also supports various atom interferometry-based sensors, facilitating their deployment in practical settings.

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Integrated, reliable laser system for an ⁸⁷Rb cold atom fountain clock

Cited by 3 publications

References 32 publications

The application and development of laser frequency stabilization techniques for atomic clocks

The application and development of laser frequency stabilization techniques for atomic clocks

Cold atom microwave clock based on intracavity cooling in China space station

Miniaturized optical system for high-precision mobile atomic gravimeters

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Integrated, reliable laser system for an 87Rb cold atom fountain clock

Cited by 3 publications

References 32 publications

The application and development of laser frequency stabilization techniques for atomic clocks

The application and development of laser frequency stabilization techniques for atomic clocks

Cold atom microwave clock based on intracavity cooling in China space station

Miniaturized optical system for high-precision mobile atomic gravimeters

Contact Info

Product

Resources

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Integrated, reliable laser system for an ⁸⁷Rb cold atom fountain clock