First phase-coherent frequency measurement of visible radiation

被引：188
|
作者：
Schnatz, H
Lipphardt, B
Helmcke, J
Riehle, F
Zinner, G
机构：
[1] Physikalisch-Technische Bundesanstalt (PTB), Braunschweig
来源：
PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.76.18
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have determined the frequency of the P-3(1)-S-1(0) intercombination transition of atomic Ca-40 stared in a magneto-optical trap to be nu = 455 986 240493.95 kHz with an estimated standard uncertainty of 0.43 kHz (delta nu/nu < 10(-12)) using a phase-coherent optical frequency chain from the Cs atomic clock to the visible. This allows the realization of the SI-unit meter according to its definition by visible radiation with 25-fold reduced uncertainty compared to previous measurements.
引用
收藏
页码：18 / 21
页数：4
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