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Silicon 16-QAM optical modulator driven by four binary electrical signals.

Jianfeng Ding, Sizhu Shao, Lei Zhang

|April 15, 2017

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Researchers developed a novel silicon 16-quadrature amplitude modulation (16-QAM) optical modulator. This new device uses a simpler electrical configuration to generate high-speed 16-QAM signals.

Area of Science:

Photonics
Optical Communications
Semiconductor Devices

Background:

Traditional 16-quadrature amplitude modulation (16-QAM) optical modulators often require complex driving electronics.
Mach-Zehnder modulators (MZMs) are key components in optical modulation, but their integration with multi-level electrical signals presents challenges.

Purpose of the Study:

To demonstrate a novel silicon-based 16-QAM optical modulator.
To simplify the electrical driving configuration for generating 16-QAM optical signals.

Main Methods:

The study utilized four Mach-Zehnder modulators (MZMs) instead of the conventional two.
The four MZMs were driven by four binary electrical signals, simplifying the overall driving scheme.
The modulator was fabricated using silicon photonics technology.

Related Experiment Videos

Main Results:

A 16-QAM optical signal was successfully generated at a data rate of 20 Gbaud.
The developed modulator achieved an error vector magnitude (EVM) of 13.7%.
The simplified electrical driving configuration proved effective for high-order modulation.

Conclusions:

The demonstrated silicon 16-QAM optical modulator offers a simpler and potentially more cost-effective solution.
This approach advances the development of high-capacity optical communication systems.
The device shows promise for future high-speed optical data transmission.