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Wavelength conversion of complex modulation formats in a compact SiGe waveguide.

M A Ettabib, C Lacava, Z Liu

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    Summary
    This summary is machine-generated.

    This study presents a silicon-germanium (SiGe) waveguide system for advanced nonlinear signal processing. It successfully demonstrated wavelength conversion for high-efficiency data signals with excellent performance metrics.

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    Area of Science:

    • Photonics
    • Optical Communications
    • Semiconductor Devices

    Background:

    • High spectral efficiency data signals are crucial for modern optical networks.
    • Nonlinear optical signal processing offers pathways to enhance data transmission capabilities.
    • Silicon-Germanium (SiGe) photonics provides a promising platform for integrated optical devices.

    Purpose of the Study:

    • To develop and evaluate a nonlinear signal processing system using a SiGe waveguide.
    • To demonstrate the feasibility of wavelength conversion for high-order Quadrature Amplitude Modulation (QAM) signals.
    • To assess the performance of the SiGe waveguide in terms of conversion efficiency, OSNR, BER, and bandwidth.

    Main Methods:

    • Utilized a silicon-germanium (SiGe) waveguide for nonlinear signal processing.
    • Employed continuous-wave (CW) pumping in a passive scheme.
    • Demonstrated Four-Wave-Mixing (FWM)-based wavelength conversion for 10-Gbaud 16-QAM and 64-QAM signals.
    • Avoided two-photon absorption (TPA) effects.

    Main Results:

    • Achieved conversion efficiency (CE) below -10 dB.
    • Obtained an idler optical signal-to-noise ratio (OSNR) of 36 dB.
    • Observed negligible bit error ratio (BER) penalty.
    • Demonstrated a 3-dB conversion bandwidth exceeding 30 nm.

    Conclusions:

    • The SiGe waveguide system is suitable for high spectral efficiency data signals.
    • The demonstrated FWM-based wavelength conversion shows high performance for advanced modulation formats.
    • The passive operation without TPA effects highlights the robustness of the SiGe platform for optical signal processing.