We propose and experimentally demonstrate a simple and stable photonic approach of frequencydoubled triangular-shaped waveform generation. It mainly consists of an integrated polarizationmultiplexing Mach–Zehnder modulator (PM-MZM) and a balance photoelectric detector (BPD). Two PM-MZM sub-modulators work at the maximum transmission point. By properly setting the amplitude of the local oscillator (LO) signal, frequency-doubled triangular-shaped waveforms can be generated. We analyze the operational principle by theory and experiment. Experimental results show that, when the frequency of LO signal is set to 3, 4, and 5 GHz respectively, triangular-shaped waveform signals with different repetition rates of 6, 8, and 10 GHz are generated, which agree well with the theoretical prediction. The structure of this system is simple and compact. In addition, the system has high-frequency tunability and operating bandwidth due the absence of optical filters.

我们提出并通过实验证明了一种简单而稳定的双倍三角波形生成的光子方法。它主要由集成的偏振多路复用马赫曾德尔调制器（PM-MZM）和天平光电检测器（BPD）组成。两个PM-MZM子调制器在最大传输点工作。通过适当设置本地振荡器（LO）信号的幅度，可以生成倍频的三角形波形。我们通过理论和实验来分析其工作原理。实验结果表明，将本振信号的频率分别设置为3 GHz，4 GHz和5 GHz时，会产生重复频率分别为6 GHz，8 GHz和10 GHz的三角形波形信号，与理论预测吻合得很好。 。该系统的结构简单紧凑。此外，