High-efficiency and flexible photonic microwave harmonic down-converter based on self-oscillation optical frequency combs  

作　　者：Xin Zhang Tao Pu Huatao Zhu Yunshan Zhang Gengze Wu Jin Li Jilin Zheng 张鑫;蒲涛;朱华涛;张云山;吴庚泽;李晋;郑吉林(College of Information and Communications,National University of Defense Technology,Wuhan 430010,China;College of Communications Engineering,Army Engineering University of PLA,Nanjing 210007,China;College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]College of Information and Communications,National University of Defense Technology,Wuhan 430010,China [2]College of Communications Engineering,Army Engineering University of PLA,Nanjing 210007,China [3]College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China

出　　处：《Chinese Optics Letters》2024年第6期196-204,共9页中国光学快报（英文版）

基　　金：supported in part by the National Natural Science Foundation of China (Nos.62071487,62201615,62301569,and 62371470)。

摘　　要：Photonic microwave harmonic down-converters (PMHDCs) based on self-oscillation optical frequency combs (OFCs) are interesting because of their broad bandwidth compared with plain optoelectronic oscillators. In this paper, a high-efficiency and flexible PMHDC is proposed and demonstrated. The properties of the OFC, such as the carrier-to-noise ratio (CNR),bandwidth and free spectral range (FSR), and the influence of optical injection, are investigated. The broadband OFC provides a frequency tunable and high-quality local oscillation (LO), which guarantees flexible down-conversion for the radio frequency (RF) signal. The sideband selective amplification (SSA) effect not only improves the conversion efficiency but also promotes single-sideband modulation. The conversion range can reach 100 GHz. The 12–40 GHz RF signal can be downconverted to intermediate frequency (IF) signals with a high conversion efficiency of 14.9 dB. The fixed 40-GHz RF signal is flexibly down-converted to an IF signal with the frequency from 55.4 to 2129.4 MHz. The phase noise of an IF signal at a frequency offset of 10 kHz is the same as that of the input RF signal. The PMHDC shows great performance and will find applications in radio-over-fiber (RoF) networks, electronic warfare receivers, avionics, and wireless communication systems.

关 键 词：frequency down-conversion optical frequency comb optical injection optoelectronic oscillation 

分 类 号：O43[机械工程—光学工程] TN773[理学—光学]