| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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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 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 |
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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.
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Received: 01 February 2021
Revised: 23 March 2021
Accepted manuscript online: 03 June 2021
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PACS:
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42.65.Dr
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(Stimulated Raman scattering; CARS)
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11774262 and 61975154). |
Corresponding Authors:
Chengjie Zhu, Runbing Li, Jing Shi
E-mail: chengjie.zhu@yahoo.com;rbli@wipm.ac.cn;jshi@whu.edu.cn
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Cite this article:
Liangwei Wang(王亮伟), Jia Guan(关佳), Chengjie Zhu(朱成杰), Runbing Li(李润兵), and Jing Shi(石兢) A low noise, high fidelity cross phase modulation in multi-level atomic medium 2021 Chin. Phys. B 30 114204
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