Hollow cathode lamp based Faraday anomalous dispersion optical filter.
Hollow cathode lamp based Faraday anomalous dispersion optical filter.
复制标题
基于空心阴极灯的法拉第反常色散光学滤波器
DOI：
10.1038/srep29882
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发表时间：
2016-07-15
影响因子：
4.6
通讯作者：
Guo H
中科院分区：
文献类型：
--
作者：
Pan D;Xue X;Shang H;Luo B;Chen J;Guo H
法拉第反常色散滤光片（FADOF）由于受到原子密度的限制，以前主要局限于某些气态元素和低熔点金属，而得到了广泛的应用。在传统的FADOF系统中，通常通过在饱和蒸汽压下的热平衡来实现高原子密度，因此对于具有高熔点的元素，需要高温。为了避免这种限制，我们提出了一种基于空心阴极灯（HCL）的FADOF方案，而不是原子蒸气室。在锶原子中的实验结果验证了该方案，得到了对应于88 Sr（5s 2）1 S 0-（5s 5 p）1 P1跃迁（461 nm）的透射峰，最大透射率为62.5%，带宽为1.19GHz。研究了透射率与磁场和HCL放电电流的关系。由于最先进的商用HCL覆盖约70种元素，该方案可以极大地扩展FADOF的应用，并且它们提供的丰富的原子跃迁为基于HCL的FADOF带来了潜在的稳频应用。
The Faraday anomalous dispersion optical filter (FADOF), which has acquired wide applications, is mainly limited to some gaseous elements and low melting-point metals before, for the restriction of the attainable atomic density. In conventional FADOF systems a high atomic density is usually achieved by thermal equilibrium at the saturated vapor pressure, hence for elements with high melting-points a high temperature is required. To avoid this restriction, we propose a scheme of FADOF based on the hollow cathode lamp (HCL), instead of atomic vapor cells. Experimental results in strontium atoms verified this scheme, where a transmission peak corresponding to the 88 Sr (5s 2) 1 S 0−(5s5p) 1 P 1 transition (461 nm) is obtained, with a maximum transmittance of 62.5% and a bandwith of 1.19 GHz. The dependence of transmission on magnetic field and HCL discharge current is also studied. Since the state-of-art commercial HCLs cover about 70 elements, this scheme can greatly expand the applications of FADOFs and the abundant atomic transitions they provide bring the HCL based FADOFs potential applications for frequency stabilization.