基于光子混频的140∼220 GHz噪声发生器  

140∼220 GHz noise generator based on photo-mixing

作　　者：赵泽宇 田雨欣 秦菲菲 刘丽娟 熊兵[3] 孙长征[3] 王健[3] 王云才 罗毅[3] Zeyu ZHAO;Yuxin TIAN;Feifei QIN;Lijuan LIU;Bing XIONG;Changzheng SUN;Jian WANG;Yuncai WANG;Yi LUO(Key Laboratory of Photonic Technology for Integrated Sensing and Communication,Ministry of Education of China,School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China;Beijing National Research Centre for Information Science and Technology(BNRist)/Department of Electronic Engineer-ing,Tsinghua University,Beijing 100084,China)

机构地区：[1]通感融合光子技术教育部重点实验室,广东工业大学信息工程学院,广州510006 [2]南方海洋科学与工程广东省实验室,珠海519082 [3]北京信息科学与技术国家研究中心/清华大学电子工程系,北京100084

出　　处：《中国科学：信息科学》2024年第6期1533-1540,共8页Scientia Sinica(Informationis)

基　　金：国家重点研发计划(批准号:2022YFB2803002);国家自然科学基金(批准号:61927811,62235005,62127814,62225405,61975093,61991443,61974080);珠江人才计划(批准号:2019CX01X019,2019ZT08X340)资助项目。

摘　　要：本文提出并实现了一种利用超宽带光探测器进行光子混频的太赫兹噪声发生器.通过改进外延结构和电极结构,首次在国内实现3 dB带宽超过200 GHz的单行载流子光电探测器(uni-travelingcarrier photodiode,UTC-PD).封装后的UTC-PD模块可在140∼220 GHz频段内实现平坦的太赫兹波输出.利用该探测器模块作为光混频器制作了光子噪声发生器,产生了频率范围为140∼220 GHz,超噪比(excess noise ratio,ENR)大于35 dB,平坦度小于±4.6 dB的太赫兹噪声,并且可以通过调节输入光功率实现超噪比的调谐.A terahertz noise generator based on photo-mixing is proposed and implemented.Terahertz noise is generated by photo-mixing multiple incoherent lights from a super luminescent diode(SLD)through a uni-traveling-carrier photodiode(UTC-PD).By optimizing the epitaxy layer structure and the electrode,the bandwidth of the UTC-PD exceeds 200 GHz.The packaged UTC-PD module exhibits a flat terahertz-wave output over the frequency range of 140-220 GHz.Terahertz noise generation over the frequency range from 140 to 220 GHz is demonstrated with an excess noise ratio(ENR)up to 354.6 dB.Furthermore,the ENR of the generated terahertz noise can be tuned by adjusting the input optical power.

关 键 词：噪声发生器 太赫兹噪声 光子混频 单行载流子光电探测器 光电转换 

分 类 号：TN773[电子电信—电路与系统] TB53[理学—物理]