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Ultracompact electro-optic phase modulator based on III-V-on-silicon microdisk resonator.

J Lloret1, R Kumar, S Sales

  • 1Institute of Telecommunications, Optical and Quantum Communications Group, Universitat Politècnica de València, Camino de Vera s/n, 46022 València, Spain. jualloso@iteam.upv.es

Optics Letters
|June 29, 2012
PubMed
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Researchers developed a novel electro-optic phase modulator using a microdisk resonator for high-speed optical communications. This compact device achieves 1.8 Gbps modulation rates without complex driving methods.

Area of Science:

  • Photonics and Optical Engineering
  • Semiconductor Devices
  • Integrated Optics

Background:

  • Electro-optic modulators are crucial for high-speed optical communication systems.
  • Existing modulators often face limitations in size, power consumption, or modulation speed.
  • III-V microdisk resonators offer potential for miniaturized and efficient photonic devices.

Purpose of the Study:

  • To present a novel ultracompact electro-optic phase modulator.
  • To demonstrate modulation capabilities using a III-V microdisk resonator integrated with a nanophotonic waveguide.
  • To evaluate the performance of the modulator in terms of power imbalance and modulation rate.

Main Methods:

  • Fabrication of an ultracompact phase modulator utilizing a 9 μm-diameter III-V microdisk resonator.

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  • Heterogeneous integration of the microdisk resonator onto a nanophotonic waveguide.
  • Implementation of modulation through effective index modification via carrier injection.
  • Proof-of-concept demonstration using binary phase shift keying (BPSK) modulation.

    • Main Results:

    • Successful demonstration of an ultracompact electro-optic phase modulator.
    • Achieved a modulation rate of up to 1.8 Gbps.
    • Observed a power imbalance of approximately 0.6 dB between symbols.
    • No special driving techniques were required for operation.

    Conclusions:

    • The presented III-V microdisk resonator-based phase modulator is a promising candidate for compact and high-speed optical communication.
    • The heterogeneous integration approach enables efficient coupling and modulation.
    • The demonstrated performance metrics suggest the viability of this technology for future photonic integrated circuits.