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With the advantage of relatively simple structure, the optical frequency standard based on calcium thermal atomic beam has the potential to be miniaturized and engineered. We develop a new fully vacuum-sealed calcium atomic beam tube, which divergence angle of calcium atomic beam is narrower and background noise of 423 nm laser-induced fluorescence is much lower than its predecessor. This paper describes...
In this paper a small Calcium beam optical frequency standard utilizing fully-sealed Calcium beam vacuum tube owning smaller size compared with vacuum system with flanges is demonstrated. Adopting the electron shelving detection method, we detect the clock transition 657 nm saturation absorbing spectroscopy whose linewidth is 500 kHz. The instability of this small optical frequency standard is 6.8×10...
Optical frequency standard is regarded as the future quantum frequency standard. With no laser cooling system, the calcium atomic beam optical frequency standard has the potential to be miniaturized and engineered, while providing a better performance than cesium clock and hydrogen clock. This paper presents the design and fabrication of a fully vacuum-sealed calcium beam tube with a smaller size...
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