In this paper, a filterless optical millimeter-wave (mm-wave) generation by frequency octupling based on two parallel dual-parallel polarization modulators circuit is proposed. From the theoretical analysis, ± 4th order optical sidebands can be generated by proper adjustment of the phases of the radio-frequency (RF) drive signals and polarizer angle. Since there is no need for an optical filter to suppress the optical carrier or unwanted harmonics, the system is suitable for the optical generation of highly stable and tunable mm-waves. Theoretical analysis is verified by computer simulation. From the obtained results, it is shown that the optically generated mm-wave signal from the proposed circuit has a high optical sideband suppression ratio (OSSR) and radio-frequency spurious suppression ratio (RFSSR) for a wide range of modulation index. This range of modulation index extends, theoretically, from 1.8 up to 7.3. For instance, at a modulation index of 5.318, an 80 GHz can be generated from a 10 GHz RF drive signal with an OSSR of 68.4 dB and an RFSSR of 62 dB. Furthermore, the effects of non-ideal system parameters on the OSSR and RFSSR are investigated.

中文翻译：

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基于两个平行双平行偏振调制器的倍频电路产生光毫米波

在本文中，提出了一种基于两个平行双平行偏振调制器电路的频率倍频产生无滤波器光学毫米波（mm-wave）。从理论分析来看，通过适当调整射频（RF）驱动信号的相位和偏振器角度，可以产生±4阶光边带。由于不需要滤光器来抑制光载波或不需要的谐波，因此该系统适用于高度稳定且可调谐的毫米波的光学生成。理论分析通过计算机模拟验证。从获得的结果中可以看出，从所提出的电路中光学生成的毫米波信号具有高光学边带抑制比 (OSSR) 和射频杂散抑制比 (RFSSR)，适用于广泛的调制指数。这个调制指数范围理论上从 1.8 扩展到 7.3。例如，在调制指数为 5.318 时，可以从 10 GHz 射频驱动信号生成 80 GHz，OSSR 为 68.4 dB，RFSSR 为 62 dB。此外，还研究了非理想系统参数对OSSR 和RFSSR 的影响。