Work

Predistortion for High-Speed Lumped Silicon Photonic Mach-Zehnder Modulators

Year: 2022

Type: article

Abstract: The use of electrical precompensation for high-speed operation of lumped MZMs is demonstrated for 50 Gb/s PAM4 modulation through experiment and simulation. An accurate equivalent circuit model is fitted to S11 measurements and then used to analyse design trade-offs in terms of system performance, energy consumption and drive voltage requirements. If precompensation is not used, careful selection of source resistance with respect to electrode and packaging inductance is shown to be crucial for high-speed modulation. Increasing the electrode inductance is shown to be beneficial as it introduces inductive peaking, which allows optimum performance with a higher source impedance. Furthermore, combining precompensation with a slight inductive peaking and optimised source resistance is demonstrated to reduce drive voltage requirements and further reduce the energy dissipated in the equivalent circuit.

Source: IEEE photonics journal

DOI: 10.1109/jphot.2022.3158255

Authors: Brian Murray, Cleitus Antony, Giuseppe Talli, Paul D. Townsend

Institutions: Tyndall National Institute, Huawei Technologies (Germany), Huawei German Research Center

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $1,850