Active optical clock

This article presents the principles and techniques of active optical clock, a special laser combining the laser physics of one-atom laser, bad-cavity gas laser, super-cavity stabilized laser and optical atomic clock together. As a simple example, an active optical clock based on thermal strontium a...

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Bibliographic Details
Published inChinese science bulletin Vol. 54; no. 3; pp. 348 - 352
Main Author Chen, JingBiao
Format Journal Article
LanguageEnglish
Published Heidelberg SP Science in China Press 01.02.2009
Subjects
Brief Communication/Atomic & Molecular Physics
Chemistry/Food Science
Earth Sciences
Engineering
Humanities and Social Sciences
Life Sciences
multidisciplinary
Physics
Science
Science (multidisciplinary)
光学原子钟
活性原子钟
激光物理
激光线宽
active atomic clock
laser linewidth
optical atomic clock
Schawlow-Townes formula
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Summary:This article presents the principles and techniques of active optical clock, a special laser combining the laser physics of one-atom laser, bad-cavity gas laser, super-cavity stabilized laser and optical atomic clock together. As a simple example, an active optical clock based on thermal strontium atomic beam shows a quantum-limited linewidth of 0.51 Hz, which is insensitive to laser cavity-length noise, and may surpass the recorded narrowest 6.7 Hz of Hg ion optical clock and 1.5 Hz of very recent optical lattice clock. The estimated 0.1 Hz one-second instability and 0.27 Hz uncertainty are limited only by the relativistic Doppler effect, and can be improved by cold atoms.
Bibliography:11-1785/N
optical atomic clock, laser linewidth, Schawlow-Townes formula, active atomic clock
TH714
ISSN:1001-6538
2095-9273
1861-9541
2095-9281
DOI:10.1007/s11434-009-0073-y