Realization of a gain with electromagnetically induced transparency system using non-degenerate Zeeman sublevels in 87Rb

OPTICS COMMUNICATIONS

卷:402

Article

Zhou, Minchuan¹  Zhou, Zifan²  Shahriar, Selim M.^1,2 

[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept EECS, Evanston, IL 60208 USA

关键词: Gain with electromagnetically induced transparency;    Negative dispersion;    Zeeman sublevels;    Quantum noise;    Gravitational wave detection;   

DOI  :  10.1016/j.optcom.2017.06.036

来源: Elsevier

【 摘 要 】

Previously, we had proposed an optically-pumped five-level Gain EIT (GETT) system, which has a transparency dip superimposed on a gain profile and exhibits a negative dispersion suitable for the white-light-cavity signal recycling (WLC-SR) scheme of the interferometric gravitational wave detector (Zhou et al., 2015). Using this system as the negative dispersion medium (NDM) in the WLC-SR, we get an enhancement in the quantum noise (QN) limited sensitivity-bandwidth product by a factor of-18. Here, we show how to realize this GEIT system in a realistic platform, using non-degenerate Zeeman sublevels in cold Rb atoms, employing anomalous dispersion at 795 nm. Using the Caves model for a phase insensitive linear amplifier, we show that an enhancement of the sensitivity-bandwidth product by a factor of-17 is possible for potentially realizable experimental parameters. While the current LIGO apparatus uses light at 1064 nm, a future embodiment thereof may operate at a wavelength that is consistent with the wavelength considered here. (C) 2017 Elsevier B.V. All rights reserved.

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