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采用了二加一的结构,提出了一种基于三并联集成马赫-曾德尔调制器(MZM)、可应用于毫米波光载无线通信(RoF)系统的新型高质量八倍频光载毫米波信号生成方案。该方案通过利用两个子马赫-曾德尔调制器(subMZMs)间射频(RF)驱动信号的电相位差为90来很好地消除两种冗余边带,再使用第三个子马赫-曾德尔调制器(sub-MZM)的偏压调整来获取最佳信号。仿真结果表明在不采用任何光或电滤波器的情况下,常规消光比(30dB)时,射频杂散抑制比(RFSSR)可以达到38.3315dB。而在理想消光比(100dB)时,光边带抑制比(OSSR)最高可达61.22878dB。该方案在理想和常规消光比下均能得到高质量的毫米波信号。
A two-plus-one structure is proposed and a new type of high quality octave optical millimeter-wave signal based on tri-parallel integrated Mach-Zehnder modulator (MZM) is proposed for millimeter-wave optical wireless communications (RoF) Generate a plan. This scheme eliminates two redundant sidebands by exploiting the electrical phase difference of the RF drive signal between the two subMZMs to 90 and then uses the third sub-Mach-Zehnder Modulator (sub-MZM) bias adjustment to obtain the best signal. The simulation results show that the RFSSR can reach 38.3315dB at the conventional extinction ratio (30dB) without any optical or electrical filters. In the ideal extinction ratio (100dB), the optical sideband suppression ratio (OSSR) up to 61.22878dB. The scheme can obtain high-quality millimeter-wave signals under the ideal and conventional extinction ratio.