Precision spectroscopy technique for dipole-allowed transitions in laser-cooled ions

Precision spectroscopy technique for dipole-allowed transitions in laser-cooled ions
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激光冷却离子中偶极子跃迁的精密光谱技术

DOI:
10.1007/s00340-014-5891-1
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发表时间:
2014
期刊:
Applied Physics B
影响因子:
--
通讯作者:
Gardner A
Gardner A
中科院分区:
--
文献类型:
--
作者:
Gardner A

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本文提出了一种精确测量囚禁离子电偶极允许跃迁的方法。通过快速连续地应用探针和冷却激光,可以探测完整的跃迁,而不会因加热离子而引起失真。此外,可以利用两个探针来测量类似色散的信号,这非常适合于将激光器稳定到跃迁。我们已经充分表征了测量的参数,并发现可以在30 s的询问时间内测量优于100 kHz的线中心。通过采用两个独立的离子阱系统来确定光谱信号的长期稳定性。第一离子阱用于稳定光谱激光器。第二个离子阱,然后通过连续探测在两个频率的过渡来测量的稳定性。从Allan方差,我们得到了频率不稳定度为1,000 s的询问时间。
In this paper , we present a technique for the precise measurement of electric dipole-allowed transitions in trapped ions. By applying a probe and a cooling laser in quick succession, the full transition can be probed without causing distortion from heating the ion. In addition, two probes can be utilized to measure a dispersion-like signal, which is well suited to stabilizing the laser to the transition. We have fully characterized the parameters for the measurement and find that it is possible to measure the line center to better than 100 kHz with an interrogation time of 30 s. The long-term stability of the spectroscopy signal is determined by employing two independent ion trap systems. The first ion trap is used to stabilize the spectroscopy laser. The second ion trap is then employed to measure the stability by continuously probing the transition at two frequencies. From the Allan variance, we obtained a frequency instability offor an interrogation time of 1,000 s.
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