中文摘要：

建立了基于强度调制器（IM）和相位调制器（PM）级联的光梳理论模型,通过仿真计算分析了光梳的平坦度与IM的偏置点βIM、IM的调制系数χIM,以及IM和PM的驱动信号相位差ΔΦ之间的关系。结果表明ΔΦ的优化取值为π的整数倍,并且与其他参数的取值无关;而βIM、χIM的优化取值存在线性关联关系,随着梳齿数目的增加,χIM的优化取值不断向0靠近,βIM的优化取值对应地不断向π靠近。研究结果为基于级联调制器的光梳优化控制提供了理论依据。

英文摘要：

The theoretical model of optical frequency comb based on cascaded intensity modulator and phase modulator was established.The relationship between the flatness of optical frequency comb and the offset point of IM（βIM）,the modulation coefficient of IM（χIM）,and the phase difference of driving signals of IM and PM（ΔΦ）was analyzed.The results show that the optimum values ofΔΦare multiples ofπand independent from other parameters.Meanwhile,the optimum values ofβIM andχIM are linearly correlated.With the number of the comb teeth increasing,the optimum value ofχIMmoves toward 0,and the optimum value ofβIMmoves towardπaccordingly.