一种基于双驱MZM调制的全光变频链路方法

An all-optical frequency conversion link method based on dual-drive MZM modulation

为实现高频信号的变频,提出了一种基于双驱马赫-增德尔调制器(MZM)的全光变频链路方法,可同时实现上变频和下变频.首先对微波光子变频链路的输入输出关系式进行了理论推导,然后给出了该链路的镜频抑制比、本振抑制比、插入损耗和无杂散动态范围的表达式,最后进行了仿真分析.仿真结果表明,本振抑制比最大可达87.45 dB,插入损耗最小可达17.77 dB,链路的无杂散动态范围为107.45dB/Hz^2/3.

In order to realize the frequency conversion of high frequency signal,this paper proposes an all-optical frequency conversion link scheme based on dual-drive MZM,which can realize frequency up-conversion and down-conversion simultaneously.Firstly,the paper deduces the input-output relationship of microwave photon frequency conversion link.Then the paper presents the expressions of image frequency rejection ratio,local oscillator rejection ratio,insertion loss and non-stray dynamic range of the link.Finally,simulation analysis is made,which shows that the maximum value of local oscillator rejection ratio is up to 87.45 dB;the minimum insertion loss is 17.77 dB and the non-stray dynamic range is 107.45 dB/Hz2/3.