Active optical clock
Active optical clock
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有源光学时钟
DOI：
10.1007/s11434-009-0073-y
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发表时间：
2009-02-01
影响因子：
--
通讯作者：
Chen JingBiao
中科院分区：
文献类型：
--
作者：
Chen JingBiao
本文介绍了一种集单原子激光器、坏腔气体激光器、超腔稳频激光器和光学原子钟的激光物理为一体的特殊激光器--主动光钟的原理和技术。作为一个简单的例子，基于热锶原子束的有源光钟的量子限制线宽为0.51赫兹，对激光腔长噪声不敏感，可能超过汞离子光钟的最窄6.7赫兹和最近记录的1.5赫兹的光格钟。估计的0.1赫兹一秒不稳定性和0.27赫兹不确定度仅受相对论多普勒效应的限制，冷原子可以改善它们。
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.