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Graphene Photonics I/Q Modulator for Advanced Modulation Formats.

Vito Sorianello1, Alberto Montanaro1,2, Marco Angelo Giambra3

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Area of Science:

  • Integrated photonics
  • Silicon photonics
  • Graphene photonics

Background:

  • Optical communication bandwidth demand is increasing, driving exploration of new applications like chip-to-chip interconnections.
  • Coherent modulation formats, traditionally for long-haul, are considered for short links to boost bandwidth density.
  • Next-generation transceivers require high bandwidth, energy efficiency, compact size, and low cost, with silicon photonics as a key enabling technology.

Purpose of the Study:

  • To address the limitations of silicon modulators (bandwidth, footprint) for next-generation transceivers.
  • To integrate graphene's unique properties (high mobility, fast dynamics, broadband) with silicon photonics.
  • To demonstrate coherent modulation using graphene photonics for higher data rates.

Main Methods:

  • Development of the first graphene photonics I/Q modulator.
  • Utilizing four graphene on silicon electro-absorption modulators.
  • Demonstration of Quadrature Phase Shift Keying (QPSK) modulation.

Main Results:

  • Successful demonstration of a graphene photonics I/Q modulator.
  • Achieved Quadrature Phase Shift Keying (QPSK) modulation at data rates up to 40 Gb/s.
  • Paved the way for coherent modulation in graphene photonics.

Conclusions:

  • Graphene is an ideal material for integration with silicon photonics to meet next-generation transceiver requirements.
  • The developed graphene photonics I/Q modulator enables advanced modulation formats for higher bandwidth optical communication.
  • This work represents a significant advancement in graphene photonics for high-speed coherent communication systems.