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提出了一种基于双平行马赫-曾德尔调制器(DPMZM)和高非线性光纤(HNLF)四波混频(FWM)效应的24倍频光生毫米波方案。首先通过控制DPMZM的直流偏压、驱动信号相位差和调制指数,完全抑制光载波和±2阶边带,获得±4阶光边带;再将其放大后输入到HNLF,通过FWM效应生成±12阶光边带,最后由光电控制器(PD)拍频得到24倍频的毫米波输出。通过仿真,验证了方案的可行性。本文方案具有倍频次数高、频谱纯度好等优点。
A 24-fold optical millimeter-wave millimeter-wave scheme based on the dual parallel Mach-Zehnder modulator (DPMZM) and high nonlinear fiber (HNLF) four-wave mixing (FWM) Firstly, by controlling the DC bias voltage of DPMZM and driving the signal phase difference and modulation index, the optical carrier and ± 2 order sidebands are completely suppressed to obtain ± 4 order optical sidebands, then amplified and input into HNLF to generate ± 12-order optical edge band, and finally by the photoelectric controller (PD) beat frequency 24 times the frequency of the millimeter wave output. Through the simulation, the feasibility of the scheme is verified. This scheme has the advantages of high frequency multiplication, good spectral purity and so on.