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Experimental observation of coherent interaction between laser and erbium ions ensemble doped in fiber at sub 10 mK

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Abstract

Rare-earth ions doped in solid-state materials are considered promising candidates for quantum information applications, especially for photonic quantum memory. Among them, erbium ions doped in an optical fiber have attracted a lot of attentions due to their ability to provide efficient photon-atom interaction on a telecom-C band compatible transition. The coherent photon-atom interaction, which is crucial for quantum memory, has not yet been investigated for erbium ions doped in fiber at the temperature of sub 10 mK with the magnetic environment. In this paper, we experimentally observe optical nutation, which results from the coherent interaction between laser and erbium ions ensemble, in a piece of 9.5-m-long fiber with the erbium concentration of 200 ppm. We also extract the transition dipole moment from the results of optical nutation and further investigate its dependence on laser wavelength and magnetic field. A transition dipole moment of (3.424±0.019)×10−32 C·m is obtained at the wavelength of 1537 nm and magnetic field of 0.2 T. Our results could pave the way for realizing solid-state quantum networks at telecom-C band.

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Acknowledgements

This work was supported by National Key R&D Program of China (Grant No. 2018YFA0307400), National Natural Science Foundation of China (Grant Nos. 61775025, 91836102, 61705033, 61405030, 61308041), Alberta Major Innovation Fund and the National Science and Engineering Research Council of Canada (NSERC).

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Authors and Affiliations

  1. Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Qi Xi, Shihai Wei, Chenzhi Yuan, Xueying Zhang, You Wang, Haizhi Song, Guangwei Deng, Bo Jing & Qiang Zhou

  2. Southwest Institute of Technical Physics, Chengdu, 610041, China

    You Wang & Haizhi Song

  3. School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Qiang Zhou

  4. Institute for Quantum Science and Technology, Department of Physics & Astronomy, University of Calgary, Calgary, T2N IN4, Canada

    Daniel Oblak

  5. CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026, China

    Guangwei Deng & Qiang Zhou

Authors
  1. Qi Xi
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  2. Shihai Wei
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  3. Chenzhi Yuan
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  4. Xueying Zhang
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  5. You Wang
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  6. Haizhi Song
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  7. Guangwei Deng
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  8. Bo Jing
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  9. Daniel Oblak
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  10. Qiang Zhou
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Corresponding authors

Correspondence to Haizhi Song, Guangwei Deng or Qiang Zhou.

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Xi, Q., Wei, S., Yuan, C. et al. Experimental observation of coherent interaction between laser and erbium ions ensemble doped in fiber at sub 10 mK. Sci. China Inf. Sci. 63, 180505 (2020). https://doi.org/10.1007/s11432-020-2954-5

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  • DOI: https://doi.org/10.1007/s11432-020-2954-5

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