光学学报, 2020, 40 (10): 1006001, 网络出版: 2020-04-28
无滤波24倍频光载毫米波发生器 下载: 1009次
Filterless 24-Tupling Frequency Millimeter-Wave Generator
光通信 光载无线电 毫米波 24倍频 无滤波 偏振复用 optical communications radio over fiber millimeter-wave 24-tupling frequency filterless polarization multiplexing
摘要
提出一种基于偏振复用的无滤波24倍频毫米波发生器,该发生器采用三平行马赫-曾德尔调制器结构和单个马赫-曾德尔调制器级联的方式,结合偏振复用的结构滤除了所有的冗余光边带,只剩下12阶光边带信号,没有采用任何光/电滤波器就能生成24倍频的高质量毫米波信号。结合系统理论研究,通过仿真验证了该发生器的可行性,对系统进行了性能分析,讨论了非理想情况下调制深度、消光比、相位差、偏置电压以及激光器线宽对系统性能的影响。研究结果表明,光边带抑制比可达到40 dB,射频杂散抑制比可达到近30 dB,系统的传输距离为150 km时仍然有着较好的传输性能。该系统方案没有使用任何辅助滤波器,具有倍频因子高、频谱质量好等优点,对无滤波高倍频毫米波发生器的研究有一定参考价值。
Abstract
Herein, a filterless 24-tupling frequency millimeter-wave generator based on polarization multiplexing was proposed. The generator cascaded a three-parallel Mach-Zehnder modulator structure and a single Mach-Zehnder modulator. Further, the generator used the polarization multiplexing structure to filter out all redundant optical sidebands, leaving only 12th order optical sideband signals. The scheme can produce a 24-tupling frequency millimeter-wave signal without any optical or electrical filter. Moreover, combined with the theoretical study of the system, the feasibility of the generator was verified via simulation. The system performance was analyzed and the effects of modulation depth, extinction ratio, phase difference, bias voltage, and line width of the laser on system performance under non-ideal conditions were discussed. The research results show that the value of the optical sideband suppression ratio and radio frequency stray suppression ratio can reach 40 dB and nearly 30 dB, respectively. The system maintains good transmission performance for 150-km transmission distance. The system does not require any auxiliary filter. This system demonstrates the advantages of a high-frequency multiplier and good spectrum quality, thus providing important reference values for research of filterless millimeter-wave generator.
薛壮壮, 裴丽, 解宇恒, 郝丹, 朱可. 无滤波24倍频光载毫米波发生器[J]. 光学学报, 2020, 40(10): 1006001. Zhuangzhuang Xue, Li Pei, Yuheng Xie, Dan Hao, Ke Zhu. Filterless 24-Tupling Frequency Millimeter-Wave Generator[J]. Acta Optica Sinica, 2020, 40(10): 1006001.