基于级联MZM倍频系数可调高频微波信号光产生方法
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摘要
理论分析了在不改变光滤波器的条件下,通过设置级联马赫曾德尔调制器的直流偏置点和调制指数,实现最小光边带抑制比和最小杂散抑制比分别为45.48dB和39.46dB,倍频系数为2k(k=1,2,…,6)的高频微波信号产生.在此基础上,分析了马赫曾德尔调制器直流偏置点、射频调制信号幅度和初始相位差等因素变化对边带选取性能的影响,并进行了相应的仿真实验,实验结果验证了该方法的可行性和有效性.
From a theoretical analysis,the frequency multiplication factor of 2 k microwave signal with a minimum optical sideband suppression ratio of 45.48 dB and a minimum spurious suppression radio of 39.46 dB is generated by properly adjusting the direct current bias points and the modulation index of the cascaded Mach-Zehnder modulators without changing the optical filter.Moreover,the performance of sideband selection with the direct current bias point of Mach-Zehnder modulator,the amplitude and the initial phase difference of the modulation signal deviate from the ideal values is analyzed.Furthermore,the performance is evaluated by simulation experiment.The simulation results validate the feasibility and effectiveness of the proposed approach.
From a theoretical analysis,the frequency multiplication factor of 2 k microwave signal with a minimum optical sideband suppression ratio of 45.48 dB and a minimum spurious suppression radio of 39.46 dB is generated by properly adjusting the direct current bias points and the modulation index of the cascaded Mach-Zehnder modulators without changing the optical filter.Moreover,the performance of sideband selection with the direct current bias point of Mach-Zehnder modulator,the amplitude and the initial phase difference of the modulation signal deviate from the ideal values is analyzed.Furthermore,the performance is evaluated by simulation experiment.The simulation results validate the feasibility and effectiveness of the proposed approach.
引文
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[2]WANG An-le,WO Jiang-hai,LUO Xiong,et,al.Ka-band microwave photonic ultra-wideband imaging radar for capturing quantitative target information[J].Optics Express,2018,26(16):20708.
[3]MICHAEL E.Microwave photonics for electronic warfare applications[C].IEEE international topical meeting on microwave photonic,2008:275-278.
[4]MATTHEW O,GEORGE E.Photonics as an enabler for multifunction electronic warfare capability[C].IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference(AVFOP),2016.
[5]MARYAM N,MEHDI S.Optimization of optical single sideband configurations for radio over fiber transmission and multi-type data communication over a DWDM link[J].Computers&Electrical Engineering,2014,40(1):83-91.
[6]LI Ze,LI Wang-zhe,CHI Hao,et al.Photonic generation of phase-coded microwave signal with large frequency tunability[J].IEEE Photonics Technology Letters,2011,23(11):712-714.
[7]LI Ming,LI Ze,YAO Jian-ping.Photonic generation of preciselyπphase-shifted binary phase-coded microwave signal[J].IEEE Photonics Technology Letters,2012,24(22):2001-2004.
[8]LI Ze,LI Ming,CHI Hao,et al.Photonic generation of phase-coded millimeter-wave signal with large frequency tunability using apolarization-maintaining fiber bragg grating[J].IEEE Microwave and Wireless Components Letters,2011,21(12):694-696.
[9]CHEN Wei,WEN Ai-jun,GAO Yong-sheng,et.al.Photonic generation of binary and quaternary phase-coded microwave waveforms with frequency quadrupling[J].IEEE Phoronics Journal,2016,8(2):5500808.
[10]BAI Guang-fu,HU Lin,JIANG Yang,et al.Versatile photonic microwave waveforms generation using a dual-parallel Mach-Zehnder modulator without other dispersive elements[J].Optics Communications,2017,396(3):134-140.
[11]CHEN Yang,WEN Ai-jun,SHANG Lei.Analysis of an optical mm-wave generation scheme with frequency octupling using two cascaded Mach-Zehnder modulators[J].Optics Communications,2010,283(7):4933-4941.
[12]TENG Yi-chao,CHEN Yi-wang,ZHANG Bao-fu,et al.Photonic generation of frequency-decupled microwave signal based on cascaded Mach-Zehnder modulators[J].Optik,2016,127(20):9275-9279.
[13]ZHU Zi-hang,ZHAO Shang-hong,LI Xuan,et al.Photonic generation of frequency-sextupled microwave signal based on dual-polarization modulation without an optical filter[J].Optics&Laser Technology,2017,87(8):1-6.
[14]ZHANG Ya-mei,ZHANG Fang-zheng,PAN Shi-long.Generation of frequency-multiplied and phase-coded signal using an optical polarization division multiplexing modulator[J].IEEE Transactions on Microwave Theory and Techniques,2017,65(2):651-660
[15]ZHU Zi-hang,ZHAO Shang-hong,LI Xuan et al.Photonic generation of frequency-octupled microwave signal with reduced electrical local oscillator power and improved spectrum purity[J].Optical and Quantum Electronics,2017,49(2):65.