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Related Experiment Video

Updated: Jan 4, 2026

Quasi-light Storage for Optical Data Packets
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Comb-based WDM transmission at 10 Tbit/s using a DC-driven quantum-dash mode-locked laser diode.

Pablo Marin-Palomo, Juned N Kemal, Philipp Trocha

    Optics Express
    |November 6, 2019
    PubMed
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    Quantum-dash mode-locked laser diodes (QD-MLLDs) enable compact wavelength-division multiplexing transceivers. Digital blind phase search (BPS) overcomes phase noise, achieving record 10.68 Tbit/s data rates without hardware compensation.

    Area of Science:

    • Photonics and Optical Communications
    • Semiconductor Lasers
    • Digital Signal Processing

    Background:

    • Chip-scale frequency combs, particularly quantum-dash mode-locked laser diodes (QD-MLLDs), are promising for compact wavelength-division multiplexing (WDM) transceivers.
    • QD-MLLDs offer small size, DC current operation, and broadband spectra but suffer from phase noise, limiting data rates and modulation formats.

    Purpose of the Study:

    • To overcome phase noise limitations in QD-MLLD based WDM systems.
    • To demonstrate high-speed data transmission using QD-MLLDs without hardware-based phase noise compensation.

    Main Methods:

    • Implementation of digital symbol-wise blind phase search (BPS) techniques for phase noise compensation.
    • 16-quadrature amplitude modulation (16QAM) dual-polarization WDM transmission experiments.

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  • Utilizing DC-driven chip-scale QD-MLLD frequency comb generators.

    • Main Results:

    • Successful demonstration of 16QAM dual-polarization WDM transmission over 38 channels.
    • Achieved an aggregate net data rate of 10.68 Tbit/s over 75 km of standard single-mode fiber.
    • Overcame phase noise limitations without requiring hardware-based compensation schemes.

    Conclusions:

    • Digital BPS techniques effectively mitigate phase noise in QD-MLLD systems.
    • This approach enables record-breaking data rates for chip-scale comb generators.
    • Paves the way for practical, high-performance WDM transceivers in future optical networks.