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5 × 25 Gbit/s WDM transmitters based on passivated graphene-silicon electro-absorption modulators
Applied Optics
|April 1, 2020
Summary
Fabrication challenges for graphene devices are addressed using scalable processes. This study demonstrates stable, hysteresis-free graphene modulators for high-volume wavelength-division multiplexing (WDM) transmitters.
Area of Science:
- Photonics and optoelectronics
- Materials science and engineering
Background:
- Graphene devices face challenges in stable, repeatable, and high-volume fabrication.
- Achieving consistent performance in graphene-based modulators is crucial for advanced optical communication systems.
Purpose of the Study:
- To demonstrate scalable fabrication processes for reliable graphene modulators.
- To develop multi-channel wavelength-division multiplexing (WDM) transmitters using graphene-silicon electro-absorption modulators.
Main Methods:
- Utilized up-scalable fabrication processes for device construction.
- Employed a passivation-first approach to encapsulate graphene, ensuring device stability.
- Fabricated three five-channel WDM transmitters, totaling 15 graphene modulators.
Main Results:
- Achieved hysteresis-free and uniform performance across all 15 graphene modulators.
- Demonstrated open-eye diagrams at 25 Gb/s with a drive voltage of 2.5 Vpp.
- Confirmed potential for multi-channel data transmission at 5x25 Gb/s per transmitter.
Conclusions:
- The developed fabrication process ensures stable and repeatable performance of graphene modulators.
- Scalable fabrication enables high-volume production of reliable WDM transmitters.
- Graphene-silicon modulators show significant promise for future high-speed optical communication systems.
