Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

doi:10.1088/1674-1056/ad3344

中国物理B ›› 2024, Vol. 33 ›› Issue (6): 64203-064203.doi: 10.1088/1674-1056/ad3344

Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

Xiao-Yun Song(宋晓云)¹, Zheng Yin(尹政)¹, Guan-Yu Ren(任冠宇)¹, Ming-Zhi Han(韩明志)³, Ai-Hong Yang(杨艾红)^1,‡, Yi-Hong Qi(祁义红)^2,§, and Yan-Dong Peng(彭延东)^1,†

1 Qingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
2 School of Physics, East China University of Science and Technology, Shanghai 200237, China;
3 MIIT Key Laboratory of Complex-field Intelligent Exploration, Beijing Institute of Technology, Beijing 100081, China

收稿日期:2023-12-21 修回日期:2024-03-03 接受日期:2024-03-13 出版日期:2024-06-18 发布日期:2024-06-18
通讯作者: Ai-Hong Yang, Yi-Hong Qi, Yan-Dong Peng E-mail:pengyd@sdust.edu.cn;yangah_phys@163.com;qiyihong@ecust.edu.cn
基金资助:
Project supported by the Shandong Natural Science Foundation, China (Grant No. ZR2021LLZ006), the National Natural Science Foundation of China (Grant Nos. 61675118 and 12274123), the Taishan Scholars Program of Shandong Province, China (Grant No. ts20190936), and the Shandong University of Science and Technology Research Fund, China (Grant No. 2015TDJH102).

Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

Xiao-Yun Song(宋晓云)¹, Zheng Yin(尹政)¹, Guan-Yu Ren(任冠宇)¹, Ming-Zhi Han(韩明志)³, Ai-Hong Yang(杨艾红)^1,‡, Yi-Hong Qi(祁义红)^2,§, and Yan-Dong Peng(彭延东)^1,†

1 Qingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
2 School of Physics, East China University of Science and Technology, Shanghai 200237, China;
3 MIIT Key Laboratory of Complex-field Intelligent Exploration, Beijing Institute of Technology, Beijing 100081, China

Received:2023-12-21 Revised:2024-03-03 Accepted:2024-03-13 Online:2024-06-18 Published:2024-06-18
Contact: Ai-Hong Yang, Yi-Hong Qi, Yan-Dong Peng E-mail:pengyd@sdust.edu.cn;yangah_phys@163.com;qiyihong@ecust.edu.cn
Supported by:
Project supported by the Shandong Natural Science Foundation, China (Grant No. ZR2021LLZ006), the National Natural Science Foundation of China (Grant Nos. 61675118 and 12274123), the Taishan Scholars Program of Shandong Province, China (Grant No. ts20190936), and the Shandong University of Science and Technology Research Fund, China (Grant No. 2015TDJH102).

摘要/Abstract

摘要： A scheme of optical four-level pulse amplitude modulation (PAM-4) is proposed based on dual-Raman process in Rydberg atoms. A probe field counter-propagates with a dual-Raman field which drives the ground and the excited states transition, respectively, and the Rydberg transition is driven by a microwave (MW) field. A gain peak appears in the probe transmission and is sensitive to the MW field strength. Optical PAM-4 can be achieved by encoding an MW signal and decoding the magnitude of a probe signal. Simulation results show that the differential nonlinearity and the integral nonlinearity of the proposed scheme can be reduced by 5 times and 6 times, respectively, compared with the counterparts of previous scheme, and the ratio of level separation mismatch is close to the ideal value 1. Moreover, the scheme is extended to optical PAM-8 signal, which may further improve the spectral efficiency.

关键词: Rydberg atoms, PAM-4/PAM-8, dual-Raman process

Abstract: A scheme of optical four-level pulse amplitude modulation (PAM-4) is proposed based on dual-Raman process in Rydberg atoms. A probe field counter-propagates with a dual-Raman field which drives the ground and the excited states transition, respectively, and the Rydberg transition is driven by a microwave (MW) field. A gain peak appears in the probe transmission and is sensitive to the MW field strength. Optical PAM-4 can be achieved by encoding an MW signal and decoding the magnitude of a probe signal. Simulation results show that the differential nonlinearity and the integral nonlinearity of the proposed scheme can be reduced by 5 times and 6 times, respectively, compared with the counterparts of previous scheme, and the ratio of level separation mismatch is close to the ideal value 1. Moreover, the scheme is extended to optical PAM-8 signal, which may further improve the spectral efficiency.

Key words: Rydberg atoms, PAM-4/PAM-8, dual-Raman process

中图分类号: (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

42.50.Gy

32.80.Qk (Coherent control of atomic interactions with photons) 32.80.Ee (Rydberg states) 42.50.Ex (Optical implementations of quantum information processing and transfer)

Xiao-Yun Song(宋晓云), Zheng Yin(尹政), Guan-Yu Ren(任冠宇), Ming-Zhi Han(韩明志), Ai-Hong Yang(杨艾红), Yi-Hong Qi(祁义红), and Yan-Dong Peng(彭延东). Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms[J]. 中国物理B, 2024, 33(6): 64203-064203.

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Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

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