提出了一种全新的基于相位-强度级联调制器和色散补偿光纤(DCF)的四进制幅移键控(4-ASK)非归零码(NRZ)到归零码(RZ)格式转换方案。理论分析了新格式转换器的工作原理,并进行了20 Gb/s的四进制幅移键控NRZ到RZ的格式转换实验研究。结果表明,该方案能将四进制幅移键控NRZ信号转换为四进制幅移键控RZ信号,转换过程不改变信号波长,且转换后信号脉宽较窄、时间抖动较原信号小,该码型转换器还可以应用于多波长幅移键控信号的码型转换。 A novel quadrature amplitude-shift-keyed (4-ASK) NRZ to RZ format conversion based on phase-intensity cascaded modulator and dispersion compensation fiber (DCF) Program. The working principle of the new format converter is analyzed in theory, and a format conversion experiment of 20 Gb / s quaternary amplitude shift keying NRZ to RZ is carried out. The results show that this scheme can convert the quadruple amplitude-shift keying (NRZ) signal to a quadruple amplitude-shift keying (RZ) signal without changing the wavelength of the signal, and the converted signal has a narrower pulse width and smaller time jitter than the original signal The pattern converter can also be applied to pattern conversion of multi-wavelength amplitude-shift keying signals.