为了简化多波长光分组交换系统的发送端结构，提出了一种基于马赫-曾德尔延时干涉仪（MZDI）器件实现多波长双二进制载波抑制归零码（DCS-RZ）格式的光分组产生方法。该方法采用单个MZDI器件将波分复用(WDM)差分相移键控(DPSK)净荷信号转换成WDM DCS-RZ净荷信号，同时完成WDM 非归零码(NRZ)标签与净荷信号的耦合，得到WDM DCS-RZ光分组信号。通过4×40 Gb/s DCS-RZ光分组信号产生、传输和分离仿真实验，验证了方法的可行性。仿真结果表明：240 km 光纤传输后，净荷在经过法布里-珀罗(F-P)滤波器分离后接收灵敏度仅下降1.8 dB。

In order to simplify the transmitter structure of the multi-wavelength optical packets switching system, a method of multi-wavelength optical packets generation based on Mach-Zehnder delay interferometer (MZDI) is proposed. Only one MZDI is used to transform the payload format from wavelength division multiplexing (WDM) differential phase shift keying (DPSK) to WDM duobinary- carrier- suppressed- return- to- zero (DCS- RZ), meanwhile, couple the WDM non-return-to-zero (NRZ) label with the WDM payload and produce the WDM DCSRZ optical packets at the output of MZDI. A simulation of 4 × 40 Gb/s DCS- RZ optical packets is generated, transmitted into fiber and then separated into the label and payload. Detection is performed to verify the feasibility of this method. The simulation results show that after 240 km fiber transmission, the power penalty of the payload after the separation using Fabry-Perot (F-P) filter is only 1.8 dB.