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Optimization of Buffer Gas Compositions in Atomic Vapor Cell for Coherent Population Trapping Atomic Clock

李云超 Yunchao Li, 胡旭文 Xuwen Hu, 张璐 Lu Zhang +5 more

Laser & Optoelectronics ProgressJan 1, 20190 citations

Microfabricated atomic clocks based on coherent population trapping

Vishal Shah

Dec 1, 20071 citation

Atomic vapor cells for chip-scale atomic clocks with improved long-term frequency stability

Svenja A. Knappe, Vladislav P. Gerginov, Peter D. D. Schwindt +4 more

A novel technique for microfabricating alkali atom vapor cells is described in which alkali atoms are evaporated into a micromachined cell cavity through a glass nozzle. A cell of interior volume 1 mm3, containing 87Rb and a buffer gas, was made in this way and integrated into an atomic clock based on coherent population trapping. A fractional frequency instability of 6 x 10(-12) at 1000 s of integration was measured. The long-term drift of the F=1, mF=0-->F=2, mF=0 hyperfine frequency of atoms in these cells is below 5 x 10(-11)/day.A novel technique for microfabricating alkali atom vapor cells is described in which alkali atoms are evaporated into a micromachined cell cavity through a glass nozzle. A cell of interior volume 1 mm3, containing 87Rb and a buffer gas, was made in this way and integrated into an atomic clock based on coherent population trapping. A fractional frequency instability of 6 x 10(-12) at 1000 s of integration was measured. The long-term drift of the F=1, mF=0-->F=2, mF=0 hyperfine frequency of atoms in these cells is below 5 x 10(-11)/day.

Optics LettersSep 15, 2005217 citations

Micromachined alkali atom vapor cells for chip-scale atomic clocks

Li‐Anne Liew, Svenja A. Knappe, John Moreland +3 more

This paper describes the fabrication of chip-scale alkali atom vapor cells, for use in highly miniaturized atomic frequency references, using silicon micromachining and anodic bonding technology. The cells consist of silicon cavities with internal volume ranging from a few mm/sup 3/ to less than 1 mm/sup 3/. The cells were filled with cesium and nitrogen buffer gas either by chemical reaction of cesium chloride and barium azide, or by direct injection of elemental cesium within a controlled anaerobic environment. Cesium optical absorption spectra were obtained from the cells, and coherent population trapping resonances with linewidths of about 1 kHz were measured.This paper describes the fabrication of chip-scale alkali atom vapor cells, for use in highly miniaturized atomic frequency references, using silicon micromachining and anodic bonding technology. The cells consist of silicon cavities with internal volume ranging from a few mm/sup 3/ to less than 1 mm/sup 3/. The cells were filled with cesium and nitrogen buffer gas either by chemical reaction of cesium chloride and barium azide, or by direct injection of elemental cesium within a controlled anaerobic environment. Cesium optical absorption spectra were obtained from the cells, and coherent population trapping resonances with linewidths of about 1 kHz were measured.

IEEE International Conference on Micro Electro Mechanical Systems (MEMS)Aug 2, 200415 citations

Compact atomic clocks based on coherent population trapping: technologies and performances for applications

Stéphane Guérandel, Jean-Marie Danet, Peter Yun +1 more

Jun 23, 20140 citations

Compact atomic clock based on Coherent Population Trapping

François Tricot, Peter Yun, Stéphane Guérandel +1 more

Oct 25, 20170 citations

Ultra-Small Atomic Clocks based on Coherent Population Trapping and Micromachined Vapor Cells

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