基于双平行马赫-曾德尔调制器的全光混频器
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摘要
传统的混频器只具备上变频或下变频的单一功能,为精简通信系统的收发模块,提出了一种基于双平行马赫-曾德尔调制器(DPMZM)实现上、下变频的全光混频器方案。该方案利用射频信号和本振信号分别驱动DPMZM上下两臂的子MZM,以实现本振和射频信号单边带调制;调节主MZM使DPMZM上、下两臂引入180°相位差从而使光载波相互抵消,输出光信号经光电探测器拍频后可得到中频信号或上变频信号。仿真结果表明:上、下变频信号抑制比皆超过了25dB,同时,无杂散动态范围达到89.7dBm。
The traditional mixer only has a single function of frequency up/down conversion. To simplify the communication system, this paper proposes an all optical mixer based on a dual-parallel Mach-Zehnder modulator(DPMZM) which with the function of frequency up/down conversion is presented. In this scheme, a radio frequency signal and a local oscillator signal drive two sub-MZMs of the DPMZM respectively in order to realize the single-sideband modulation. By properly setting the 180° phase difference to offset the optical the optical carrier by adjusting the main MZM. After the photodiode, IF/up signal can be obtained.Verified by simulation, the result shows that the spurious suppression radio of up/dowm signal higher than 25 dB, meanwhile, the spurious free dynamic range can reach up to 89.7 dBm.
The traditional mixer only has a single function of frequency up/down conversion. To simplify the communication system, this paper proposes an all optical mixer based on a dual-parallel Mach-Zehnder modulator(DPMZM) which with the function of frequency up/down conversion is presented. In this scheme, a radio frequency signal and a local oscillator signal drive two sub-MZMs of the DPMZM respectively in order to realize the single-sideband modulation. By properly setting the 180° phase difference to offset the optical the optical carrier by adjusting the main MZM. After the photodiode, IF/up signal can be obtained.Verified by simulation, the result shows that the spurious suppression radio of up/dowm signal higher than 25 dB, meanwhile, the spurious free dynamic range can reach up to 89.7 dBm.
引文
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[10] LONGTAO X, SHILEI J, YIFEI L. Frequency down-conversion using photodiode sampling[J]. IEEE J. Sel. Topics Quantum Electron., 2016, 50(12):271-274.
[2] MIYAMOTO R Y, ITOH T. Retrodirective arrays for wireless communications[J]. IEEE Microw. Mag., 2002, 3(1):71-79.
[3] BIL R, HOLPP W. Modern phased array radar systems[J]. 2016 IEEE Int. Symp. Phased Array Syst. Technol., 2016, 5(8):1-7.
[4] YAO J P. Microwave photonics[J]. J. Lightwave Technol., 2009, 32(7):314-335.
[5] FUSTER J M, MARTI J. Optimization of the dynamic range in optically amplified harmonic downconverting fiber-optic link[J]. IEEE Photon, 1999,11(7):877-879.
[6] BERCELI T, HERCZFELD P. Microwave photonics-a historical perspective[J]. IEEE. Trans. Microw. Theory Tech., 2010, 58(11):1-9.
[7] CAPMANY J, NOVAK D. Microwave photonics combines two worlds[J]. Nat. Photonics, 2009, 32(7):314-335.
[8] ERWIN H W C, ROBERT A M. Microwave Photonic Downconverter With High Conversion Efficiency[J]. Journal of Lightwave Technology,2012, 30(23):3580-3585.
[9] TANG Z, ZHANG F, ZHU D X, et al. A photonic frequency downconverter based on a single dual-drive Mach-Zehnder modulator[J]. IEEE Topical Meeting Microw. Photon., 2013, 42(12):150-153.
[10] LONGTAO X, SHILEI J, YIFEI L. Frequency down-conversion using photodiode sampling[J]. IEEE J. Sel. Topics Quantum Electron., 2016, 50(12):271-274.