文献类型：期刊文献

中文题名：Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

英文题名：Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

作者：Song, Xiao-Yun[1];Yin, Zheng[1];Ren, Guan-Yu[1];Han, Ming-Zhi[3];Yang, Ai-Hong[1];Qi, Yi-Hong[2];Peng, Yan-Dong[1]

机构：[1]Shandong Univ Sci & Technol, Coll Elect & Informat Engn, Qingdao Key Lab Terahertz Technol, Qingdao 266590, Peoples R China;[2]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[3]Beijing Inst Technol, MIIT Key Lab Complex Field Intelligent Explorat, Beijing 100081, Peoples R China

年份：2024

卷号：33

期号：6

中文期刊名：Chinese Physics B

外文期刊名：CHINESE PHYSICS B

收录：CSTPCD;;EI(收录号：20242216185811);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:001233335200001)】；CSCD:【CSCD2023_2024】；PubMed;

基金：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).

语种：英文

中文关键词：Rydberg atoms;PAM-4/PAM-8;dual-Raman process

外文关键词：Rydberg atoms; PAM-4/PAM-8; dual-Raman process; 42.50.Gy; 32.80.Qk; 32.80.Ee; 42.50.Ex

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.
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.