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arXiv 0810.0623physics.atom-phphysics.optics
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基于脉冲相干光存储的原子频标

Atomic Frequency standards Based on Pulsed Coherent Light Storage

Bo Yan, Yisheng Ma, Yuzhu Wang

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6 pages, 5 figures
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摘要：

提出了一种基于脉冲相干光信息存储的微波频标方案。与通常的频率参考不同，其中Ramsey条纹被打印在特定状态的布居上，我们将Ramsey条纹打印在相干性上。然后，以检索光的形式检测相干性。在基于吸收池的原子频标中，拉姆齐条纹的中心线可用作频率基准。该方案是免费的光移位的询问过程是从光泵的过程中分离，和腔拉效应是可以忽略不计，由于低Q值的要求。将Ramsey干涉编码到恢复光脉冲中具有信噪比高的优点，其散粒噪声极限的频率稳定度估计为1秒$2\times10^{-14}$左右，该方案有望用于建立小型、紧凑、稳定的原子频标。

英文摘要：

We propose a new scheme of microwave frequency standards based on pulsed coherent optical information storage. Unlike the usual frequency reference where the Ramsey fringe is printed on the population of a certain state, we print the Ramsey fringe on the coherence. Then the coherence is detected in the form of a retrieval light. The central line of the Ramsey fringe can be used as a frequency reference in an absorption-cell-based atomic frequency standard. This scheme is free of light shifts as the interrogating process is separated from the optical pumping processes, and the cavity pulling effect is negligible due to the low Q requirement. Encoding the Ramsey interference into the retrieval light pulse has the merit of high signal to noise ratio and the estimated frequency stability of shot noise limit is about $2\times10^{-14}$ in 1 second, this scheme is promising for building small, compact and stable atomic frequency standards.

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