Ten years of active optical frequency standards

Pan, Duo; Zhuang, Wei; Xue, Xiaobo; Zhang, Xiaogang; Chen, Mo; Xu, Zhichao; Chen, Jingbiao

doi:10.1109/fcs.2015.7138859

Cited by 5 publications

(1 citation statement)

References 38 publications

(73 reference statements)

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“…Therefore, the laser frequency of the AOC will not follow the fluctuations of the cavity length exactly, but in a form of the suppressed cavity-pulling effect, and the extent of the suppression equals the bad-cavity coefficient a, where a = Γ cavity Γ gain . Since it was proposed, various types of active atomic systems have been investigated [20][21][22][23][24][25][26][27]. Recently, a superradiant pulse from the strontium clock transition with a fractional Allan deviation of 6.7(1) × 10 −16 at 1 s has been realized [27].…”

Section: Introductionmentioning

confidence: 99%

Realization of phase locking in good-bad-cavity active optical clock

Shi¹,

Pan²,

Chen³

2019

Opt. Express

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The residual cavity-pulling effect limits further narrowing of linewidth in dualwavelength (DW) good-bad-cavity active optical clocks (AOCs). In this paper, we for the first time experimentally realize the cavity-length stabilization of the 1064/1470 nm DW-AOCs by utilizing the phase locking technique of two independent 1064 nm good-cavity lasers. The frequency tracking accuracy between the two main-cavities of DW-AOCs is better than 3 × 10 −16 at 1 s, and can reach 1 × 10 −17 at 1000 s. Each 1470 nm bad-cavity laser achieves a most probable linewidth of 53 Hz, which is about a quarter of that without phase locking. The influence of the asynchronous cavity-lengths variation between two DW laser systems is suppressed.

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