A novel photonic vector THz-wave signal generation at terahertz-wave (THz-wave) band by Mach Zendell modulator (MZM) -based optical frequency comb and in-phase and quadrature (IQ) modulator for signal modulation scheme is proposed. And we demonstrate 16 quadrature-amplitude-modulation (QAM) vector THz-wave signal generation and transmission by simulation. The IQ modulator is driven by a 2-Gbaud/3-Gbaud 16-QAM-modulated baseband signal.The MZM is driven by a radio frequency signal at the frequency of 30 GHz to generate optical frequency comb. The generated 390 GHz THz-wave radio frequency signal after heterodyne beating in uni-travelling photodiode (UTC-PD) is transmitted over 0 km/10 km single-mode-fiber transmission. The 390-GHz electrical vector THz-wave signal carring 16-QAM modulation can be generated with a bit error ratio (BER) of less than the hard-decision forward-error-correction (HD-FEC) threshold of 3.8e-3. To the best of our knowledge, it's the first time to generate 390 GHz photonic vector THz-wave signal on the basis of simple MZM-based optical frequency comb.

中文翻译：

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通过简单的基于 MZM 的光频梳生成 16-QAM 矢量太赫兹波信号

提出了一种通过基于 Mach Zendell 调制器 (MZM) 的光频梳和同相正交 (IQ) 调制器在太赫兹波 (THz 波) 波段产生的新型光子矢量太赫兹波信号，用于信号调制方案。我们通过仿真演示了 16 个正交调幅 (QAM) 矢量太赫兹波信号的生成和传输。IQ调制器由2-Gbaud/3-Gbaud 16-QAM调制基带信号驱动。MZM由30 GHz频率的射频信号驱动，产生光频梳。在单行光电二极管 (UTC-PD) 中外差拍频后产生的 390 GHz THz 波射频信号通过 0 km/10 km 单模光纤传输传输。可以生成带有 16-QAM 调制的 390-GHz 电矢量太赫兹波信号，其误码率 (BER) 小于硬判决前向纠错 (HD-FEC) 阈值 3.8e-3。据我们所知，这是第一次在简单的基于 MZM 的光频率梳的基础上产生 390 GHz 光子矢量太赫兹波信号。