基于双平行马赫曾德尔调制器和受激布里渊散射效应的十倍频毫米波信号生成

提出了一种基于双平行马赫-曾德尔调制器(DPMZ M)和受激布里渊散射(SBS)效应的10倍频mm 波信号生成方案,具有覆盖频段高和频谱纯度高等优点。在本文方案中,低频率的射频(RF )信号通过DPMZM 对激光器发出的光波进行调制,调节直流偏置电压,使DPMZM的主调制器和两个子调制器均 工作在最小传 输点(MITP),抑制光载波和偶数边带,进一步调节两个子调制器的调制深度和移相器的相 移,抑制一阶和 七阶边带,留下三阶和五阶边带,然后利用SBS效应进行布里渊边带滤波滤除三阶边带,仅 保留五阶边带, 再经光电探测器(PD)拍频即可获得10倍频mm波信号。通过仿真实验,以10 GHz的R F信号为驱 动信号,得到了100GHz的mm波信号,验证了方案的可行性。

Frequency 10-tupling millimeter signal generation based on dual-parallel Mach-Zehnder modulator and stimulated Brillouin scattering

A scheme based on dual-parallel Mach-Zehnder modulator (DPMZM) and stimulate d Brillouin scattering (SBS) effect is proposed to generate millimeter wave signals with a frequency 10times of the radio frequency (RF) signal,which possesses the advantages of wide frequency and high spectral purity.In this sche me,a low frequency RF signal modulates the lightwave by a dual-parallel Mach-Zehnder modulator in which the main modulator and two sub modulators are all biased at the minimum transmission point via adjusting the dc bias to suppress the even-order sidebands.Then the first-order and seventh-order sidebands at the output of d ual-parallel Mach-Zehnder modulator can be suppressed by properly adjusting modulation indices of the sub modulators and phase shift of the phase shifter,so that the third-order and fifth-order sidebands can be ret ained.The third-order sidebands can be filtered out by SBS-assisted filter of stimulated Brillouin scattering effec t,with fifth-order sidebands retained only.And then through beat frequency of the photoelectric detector (PD),millimet er wave signals with a frequency 10times of RF signal can be obtained.Finally,s imulation is performed to verify the feasibility of the scheme.When the frequency of the RF driving signal is 10GHz,the millimeter wave signal with fre quency of 100GHz is achieved.