Bashir Dar Aasif, Ahmad Faroze
Appl Opt. 2020 Jul 10;59(20):6018-6023. doi: 10.1364/AO.395712.
An optical millimeter-wave generation technique is presented in this paper. The system's two frequency quadruplers use dual-parallel Mach-Zehnder modulators. A 5 GHz radio frequency signal is fed to a quadrupler, which yields a 20 GHz signal after detection using a photodiode. The detected signal is used for remodulation of the other quadrupler, resulting in an 80 GHz signal with an optical sideband suppression ratio of 28 dB and a radio frequency spurious sideband suppression ratio of 27 dB. Further, the effect on the system performance in terms of the optical sideband suppression ratio and radio frequency spurious sideband suppression ratio with variation of various parameters is also evaluated. The optical sideband suppression ratio is well above 14 dB for a phase offset of ±9 in phase shifters with a modulation index range of 1.5-3.5 and an amplifier gain range of 25 dB to 32 dB.
本文提出了一种光学毫米波产生技术。该系统的两个倍频器采用双平行马赫-曾德尔调制器。一个5GHz的射频信号被馈入一个倍频器，该倍频器在使用光电二极管检测后产生一个20GHz的信号。检测到的信号用于对另一个倍频器进行再调制，从而产生一个80GHz的信号，其光学边带抑制比为28dB，射频杂散边带抑制比为27dB。此外，还评估了各种参数变化对系统性能在光学边带抑制比和射频杂散边带抑制比方面的影响。对于移相器中相位偏移为±9、调制指数范围为1.5 - 3.5且放大器增益范围为25dB至32dB的情况，光学边带抑制比远高于14dB。
