Design and Simulation of a Mach-Zehnder Modulator with Push-Pull Configuration
应用文章
Mach-Zehnder Modulators (MZMs) are fundamental components in high-speed optical transmitters, converting electrically controlled phase changes into optical intensity modulation. Their bandwidth, footprint, energy consumption, and modulation performance can significantly influence the cost and complexity of optical communication systems. Accurately modeling MZM behavior across device, circuit, and system levels is therefore critical to balancing these competing design requirements.
This application note demonstrates an integrated workflow for designing and evaluating a Silicon Mach-Zehnder modulator with a push-pull configuration. The process connects RSoft Photonic Device Tools with ADS Photonic Designer, enabling engineers to progress from individual photonic device simulation through reusable model generation and complete Electro-Optical-Electro (EOE) link evaluation.
RSoft BeamPROP and the Multi-Physics Utility are used to simulate and optimize key MZM building blocks, including the Y-branch splitter and waveguide phase shifters. The Custom-PDK Generation Utility then supports the extraction of S-parameter data and active phase-shifter models, allowing the custom device to be converted into reusable components for circuit-level analysis.
These models are subsequently integrated within ADS Photonic Designer to construct and characterize the complete MZM. Multiple simulation techniques provide insight into device behavior under different operating conditions, including S-parameter analysis for bias characterization and envelope simulation for system-level verification. The MZM can then be incorporated into a high-speed EOE communication link with a PIN photodetector to evaluate modulation performance, operating conditions, and signal integrity.
By connecting device-level physics with circuit- and system-level simulation, this unified workflow helps maintain consistency throughout the design process while reducing manual model transfer between engineering stages. Engineers can characterize custom MZM designs, create reusable PDK components, and evaluate their impact within complete optical links, providing a scalable approach to developing high-performance photonic integrated circuits.