Ultranarrow bandwidth Faraday atomic filter approaching natural linewidth based on cold atoms

Wei Zhuang; Yang Zhao; Shaokai Wang; Zhanjun Fang; Fang Fang; Tianchu Li

doi:10.3788/COL202119.030201

Journals >Chinese Optics Letters >Volume 19 >Issue 3 >Page 030201 > Article

Chinese Optics Letters
Vol. 19, Issue 3, 030201 (2021)

Ultranarrow bandwidth Faraday atomic filter approaching natural linewidth based on cold atoms

Wei Zhuang^*, Yang Zhao, Shaokai Wang, Zhanjun Fang, Fang Fang, and Tianchu Li

Author Affiliations

National Institute of Metrology, Beijing 100029, China

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DOI: 10.3788/COL202119.030201 Cite this Article Set citation alerts

Wei Zhuang, Yang Zhao, Shaokai Wang, Zhanjun Fang, Fang Fang, Tianchu Li. Ultranarrow bandwidth Faraday atomic filter approaching natural linewidth based on cold atoms[J]. Chinese Optics Letters, 2021, 19(3): 030201 Copy Citation Text

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Abstract

An ultranarrow bandwidth Faraday atomic filter is realized based on cold

{}^{87}{Rb}

atoms. The atomic filter operates at 780 nm on the

5^{2} S_{1 / 2}

F = 2

5^{2} P_{3 / 2}

F' = 3

transition with a bandwidth of 7.1(8) MHz, which is approaching the natural linewidth of the transition. The peak transmission achieves 2.6(3)% by the multi-pass probe method. This atomic filter based on cold atoms may find potential applications in self-stabilizing lasers in the future.

Keywords

atomic filter cold atoms Faraday effect Faraday laser