中国物理B ›› 2021, Vol. 30 ›› Issue (11): 114204-114204.doi: 10.1088/1674-1056/ac078d

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A low noise, high fidelity cross phase modulation in multi-level atomic medium

Liangwei Wang(王亮伟)1, Jia Guan(关佳)2, Chengjie Zhu(朱成杰)3,4,†, Runbing Li(李润兵)5,‡, and Jing Shi(石兢)1,§   

  1. 1 Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China;
    2 School of Physics Science and Engineering, Tongji University, Shanghai 200092, China;
    3 School of Physical Science and Technology, Soochow University, Suzhou 215006, China;
    4 Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China;
    5 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
  • 收稿日期:2021-02-01 修回日期:2021-03-23 接受日期:2021-06-03 出版日期:2021-10-13 发布日期:2021-10-13
  • 通讯作者: Chengjie Zhu, Runbing Li, Jing Shi E-mail:chengjie.zhu@yahoo.com;rbli@wipm.ac.cn;jshi@whu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11774262 and 61975154).

A low noise, high fidelity cross phase modulation in multi-level atomic medium

Liangwei Wang(王亮伟)1, Jia Guan(关佳)2, Chengjie Zhu(朱成杰)3,4,†, Runbing Li(李润兵)5,‡, and Jing Shi(石兢)1,§   

  1. 1 Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China;
    2 School of Physics Science and Engineering, Tongji University, Shanghai 200092, China;
    3 School of Physical Science and Technology, Soochow University, Suzhou 215006, China;
    4 Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China;
    5 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2021-02-01 Revised:2021-03-23 Accepted:2021-06-03 Online:2021-10-13 Published:2021-10-13
  • Contact: Chengjie Zhu, Runbing Li, Jing Shi E-mail:chengjie.zhu@yahoo.com;rbli@wipm.ac.cn;jshi@whu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11774262 and 61975154).

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摘要： We develop a hybrid scheme of cross phase modulation based on electromagnetically induced transparency (EIT) and active Raman gain (ARG) in a multi-level atomic medium. The cross phase modulation, with low loss and without noise, is demonstrated in a room-temperature 85Rb vapor. We show that a π radian nonlinear Kerr phase shift of the signal light relative to a reference light is observed when the signal light is modulated by the phase control field with the low light intensity. We also show that the linear and the third-order absorption can be eliminated via the Raman gain, and the phase noise of the signal light can be ignored when the phase control light is applied in this hybrid scheme.

关键词: phase modulation, electromagnetically induced transparency, nonlinear Kerr phase shift

Abstract: We develop a hybrid scheme of cross phase modulation based on electromagnetically induced transparency (EIT) and active Raman gain (ARG) in a multi-level atomic medium. The cross phase modulation, with low loss and without noise, is demonstrated in a room-temperature 85Rb vapor. We show that a π radian nonlinear Kerr phase shift of the signal light relative to a reference light is observed when the signal light is modulated by the phase control field with the low light intensity. We also show that the linear and the third-order absorption can be eliminated via the Raman gain, and the phase noise of the signal light can be ignored when the phase control light is applied in this hybrid scheme.

Key words: phase modulation, electromagnetically induced transparency, nonlinear Kerr phase shift

中图分类号:  (Stimulated Raman scattering; CARS)

  • 42.65.Dr
42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)