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Related Concept Videos

Semiconductors01:22

Semiconductors

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There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
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Related Experiment Video

Updated: Nov 28, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Integrated silicon reconfigurable optical transmitter.

Wei Liu, Sidong Fu, Yu Yu

    Optics Letters
    |December 1, 2020
    PubMed
    Summary

    This study presents a reconfigurable optical transmitter using a silicon Mach-Zehnder interferometer (MZI). The device can generate various modulation formats for flexible optical communication links.

    Area of Science:

    • Photonics and Optical Communications
    • Integrated Silicon Photonics
    • Optical Transmitter Technology

    Background:

    • Optical transmitters are crucial components in modern communication systems.
    • The need for flexible and adaptable optical links necessitates reconfigurable transmitter architectures.
    • Existing transmitters often lack the ability to support multiple modulation formats efficiently.

    Purpose of the Study:

    • To demonstrate an integrated silicon reconfigurable optical transmitter.
    • To showcase the generation of diverse modulation formats using a single device.
    • To validate the transmitter's capability for next-generation intelligent optical links.

    Main Methods:

    • Utilizing a tunable Mach-Zehnder interferometer (MZI) structure.

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  • Integrating microring modulators into the MZI for signal manipulation.
  • Adjusting operational states to achieve different modulation formats.

    • Main Results:

    • Successfully generated 10 GBaud on-off keying (OOK) signals.
    • Demonstrated generation of four-level pulse amplitude modulation (PAM4) signals.
    • Experimentally produced polarization division multiplexing (PDM-OOK) signals from the same transmitter.

    Conclusions:

    • The integrated silicon reconfigurable optical transmitter offers high flexibility.
    • The MZI-based design effectively supports multiple modulation formats.
    • This technology is a promising candidate for future intelligent optical networks.