Alkali metal-wax micropackets for chip-scale atomic clocks
Alkali metal-wax micropackets for chip-scale atomic clocks
复制标题
用于芯片级原子钟的碱金属蜡微包
DOI：
10.1109/sensor.2005.1496349
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
A. Lal
中科院分区：
文献类型：
--
作者：
S. Radhakrishnan;A. Lal
我们报告了一种新的方法，用于制造芯片级原子钟（CSAC）的蒸汽细胞使用晶圆级微加工工艺。将碱金属封闭在化学惰性蜡中以预形成碱金属-蜡微包，从而在蒸汽电池制造期间防止碱金属与环境反应。除了在所得蒸汽电池中碱金属的高纯度水平之外，该方法还有望廉价且灵活地制造蒸汽电池，以及容易处理用于除CSAC之外的各种应用的碱金属。所制备的铷-87（Rb/sup 87/）蒸气盒在Rb/sup 87/的D2跃迁上的光吸收显示出超过65%的对比度，这对CSAC的频率稳定性很重要。
We report a novel methodology for fabrication of vapor cells for chip-scale atomic clocks (CSAC) using wafer-scale micromachining processes. Alkali metals are enclosed in a chemically inert wax to preform alkali metal-wax micropackets, keeping the alkali metals from reacting with the ambient during the vapor cell fabrication. Apart from the high level of purity of the alkali metals in the resulting vapor cells, this method holds promise for inexpensive and flexible manufacturing of vapor cells, as well as easy handling of alkali metals used for a variety of applications other than for CSAC. The optical absorption on fabricated rubidium-87 (Rb/sup 87/) vapor cells over the D2 transitions of Rb/sup 87/ shows a contrast of more than 65%, important to the frequency stability of CSAC.