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arXiv · 2012.03430

Prospects for 10^{-18} Instability Laser Referenced on Thermal Atomic Ensembles

Haosen Shang·Duo Pan·Xiaogang Zhang·Xiaobo Xue·Tiantian Shi·Jingbiao Chen
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Abstract

A thermal atomic ensemble-based laser source with superior frequency stability is proposed that relies on the accumulated contributions from an abundance of nonzero-transverse-velocity atomic ensembles. Compared with the traditional case in which only atoms with near-zero transverse velocities are utilized, the amplitude of the optical Ramsey fringes for a thermal calcium beam can be dramatically enhanced by three orders of magnitude or more, thus, the signal-to-noise ratio can be improved 33-fold. Based on the recent results of atomic interferometry-based laser stabilization, a quantum projection noise-limited frequency instability less than 2E-17/tau^0.5 is feasible. Such an ultrastable laser has promising applications in diverse areas, including metrology and astronomy.

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Haosen Shang, Duo Pan, Xiaogang Zhang, Xiaobo Xue, Tiantian Shi, Jingbiao Chen. 2020-12-07. Prospects for 10^{-18} Instability Laser Referenced on Thermal Atomic Ensembles. https://arxiv.org/abs/2012.03430

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