An electrostatic doping (ED) based 35 Gb/s dual-parallel Mach-Zehnder modulator (DP-MZM) for photonic integrated circuits (PICs) is proposed and analyzed. Theoretical formulation of the transfer function and linearity analysis of the proposed modulator is also presented here. The proposed modulator contains two ED-aided sub-MZMs and an ED-aided optical phase shifter (PS) in a MZI structure. Numerical simulations are performed using commercially available tools and the simulation results are presented here. From the results we estimate that the proposed DP-MZM with 400 μm long sub-MZMs can offer peak dynamic extinction ratio (ER) of 14 dB with maximum 8.7 dB of insertion loss (IL) at 10 Gb/s data rate. Using dual-tone test method, the predicted spurious free dynamic range (SFDR) of the modulator are 62.74 dB·Hz^1/2 and 99.35 dB·Hz\(^{2/3}\) for second and third harmonic intermodulation distortions (IMD2 and IMD3), respectively. From the transient analysis, the estimated maximum operating frequency and 3-dB EO bandwidth of the modulator are approximately 35.5 GHz and 32.37 GHz, respectively. At maximum data rate, 5.89 dB of dynamic ER is offered by the proposed DP-MZM for OOK modulation. Simulation verifies successful transmission of 25 Gb/s OOK modulated PRBS data stream over a 10 km standard single mode fiber (SSMF) link. Furthermore, we have shown that the proposed DP-MZM is capable of generating 50 Gb/s PAM-4 signal, which makes the modulator suitable for next-generation short-reach interconnects.

提出并分析了用于光子集成电路（PIC）的基于静电掺杂（ED）的35 Gb / s双并行马赫曾德尔调制器（DP-MZM）。本文还介绍了传递函数的理论公式和拟议调制器的线性分析。所提出的调制器在MZI结构中包含两个ED辅助子MZM和一个ED辅助光学移相器（PS）。使用市售工具进行数值模拟，并在此处显示模拟结果。从结果中我们估计，所提议的具有400μm长的子MZM的DP-MZM在10 Gb / s数据速率下可以提供14 dB的峰值动态消光比（ER），最大插入损耗（IL）为8.7 dB。使用双音测试方法，调制器的预测无杂散动态范围（SFDR）为62.74 dB·Hz ^1/2对于二次谐波和三次谐波互调失真（IMD2和IMD3）分别为99.35 dB·Hz \（^ {2/3} \）。根据瞬态分析，调制器的估计最大工作频率和3-dB EO带宽分别约为35.5 GHz和32.37 GHz。在最大数据速率下，拟议的DP-MZM可为OOK调制提供5.89 dB的动态ER。仿真可以验证在10 km标准单模光纤（SSMF）链路上成功传输了25 Gb / s OOK调制的PRBS数据流。此外，我们已经表明，提出的DP-MZM能够产生50 Gb / s PAM-4信号，这使调制器适合于下一代短程互连。