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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

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Chirp management in silicon-graphene electro absorption modulators.

V Sorianello, G Contestabile, M Midrio

|October 19, 2017

Summary

Graphene electro-absorption modulators (EAMs) exhibit a large positive chirp, enabling effective chromatic dispersion compensation in fiber optic communications. This technology achieved 60 km dispersion compensation and 100 km transmission with a low bit error rate.

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Area of Science:

Photonics
Materials Science
Optical Communications

Background:

Electro-absorption modulators (EAMs) are crucial for optical communications.
Graphene's unique optoelectronic properties offer potential for advanced modulator designs.

Purpose of the Study:

To investigate the frequency chirp characteristics of graphene-on-silicon EAMs.
To explore the application of graphene-induced chirp for chromatic dispersion compensation.

Main Methods:

Experimental measurement of chirp in a single-layer graphene EAM.
10 Gb/s fiber optic transmission experiments utilizing the chirp effect for dispersion compensation.

Main Results:

Graphene EAMs exhibit a large positive linear chirp, up to 1.8 GHz frequency shift.
Demonstrated 60 km dispersion compensation with a 0-dB OSNR penalty.
Achieved 100 km transmission with a bit error rate below the Reed-Solomon threshold.

Conclusions:

Graphene's optoelectronic properties can be leveraged for significant frequency chirp in EAMs.
This chirp effect enables effective chromatic dispersion compensation in fiber optic systems.
Graphene-based EAMs show promise for enhancing long-haul optical data transmission.