基于单个双驱动马赫-曾德尔调制器(DDMZM)，提出一种宽且平坦的可调谐光学频率梳(OFC)的产生方案，其结构简单、易于实现、成本低。对方案原理进行理论分析，利用Optisystem 7.0软件进行仿真研究。结果表明，产生的OFC梳线数目不多，但平坦度较好，中心频率和梳线间距均可独立调谐。可调谐光源的中心频率决定了OFC的中心频率。将基于光外差法产生的微波射频信号作为DDMZM的驱动信号，确定了OFC的梳线间距，最大可达150 GHz，有效频谱带宽为600 GHz。

Based on single dual drive Mach-Zehnder modulator (DDMZM), a scheme of generating wide and flat tunable optical frequency comb (OFC) is proposed. This scheme has the advantages of simple structure easy to implement, and low cost. A theoretical analysis on the principles of the scheme is conducted and simulation research is carried out with the software Optisystem 7.0. The results show that, as for the generated OFC, although the comb-line number is not big, the flatness is better, and both of its center frequency and line spacing can be tuned independently. The center frequency of the tunable light source determines that of OFC. The comb-line spacing of OFC is obtained by the generated microwave radio-frequency signal based on optical heterodyne method as driving signal of DDMZM, which is up to 150 GHz, and the effective band width is 600 GHz.