Thin-film lithium niobate dual-parallel Mach-Zehnder modulator for a simple photonic system measuring Doppler frequency shift  

作　　者：Jinming Tao Xintong Li Run Li Peng Wang Tian Zhang Jinye Li Jianguo Liu 陶金铭;李欣桐;李润;王鹏;张田;李金野;刘建国(Laboratory of Nano Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;College for Intelligent Photonics,Nankai University,Tianjin 300071,China)

机构地区：[1]Laboratory of Nano Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [4]College for Intelligent Photonics,Nankai University,Tianjin 300071,China

出　　处：《Chinese Optics Letters》2024年第9期19-25,共7页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61727815)and the National Key Research and Development Program of China(No.2022YFB2803200).

摘　　要：In recent years,thin-film lithium niobate(TFLN)electro-optic(EO)modulators have developed rapidly and are the core solution for the next generation of microwave photonics(MWP)problems.We designed and fabricated a dual-parallel Mach-Zehnder modulator(DPMZM)based on TFLN,achieving a 3 dB electro-electro(EE)bandwidth of 29 GHz and a low drive voltage(Vπ=6 V).The device we manufactured is metal-encapsulated.It is noteworthy that we proposed a single-channel Doppler frequency shift(DFS)measurement system based on this device and conducted verification experiments.We coupled light from an external laser into the chip and passed it through each of the two sub-MZMs of the DPMZM.These lights were modulated by echo signals and reference signals.By measuring the frequency of the output signal,we can obtain a DFS value without directional ambiguity.The success of this experiment marks a key step in the practical application of TFLN modulators in MWP.

关 键 词：dual-parallel Mach-Zehnder modulator lithium niobate on insulator Doppler frequency shift microwave photonics. 

分 类 号：TN761[电子电信—电路与系统]