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    Area of Science:

    • Photonics
    • Nonlinear Optics
    • Optical Communications

    Background:

    • Conventional time-lenses (TLs) often require high pump power.
    • Achieving efficient optical signal processing, like continuous-wave (CW) to pulse conversion, is crucial for high-speed communications.

    Purpose of the Study:

    • To introduce a novel all-optical discrete multilevel time-lens (DM-TL) design.
    • To demonstrate reduced pump power requirements compared to traditional parabolic TLs.
    • To showcase the application of DM-TL in energy-preserving CW-to-pulse conversion.

    Main Methods:

    • Utilizing cross-phase modulation (XPM) to synthesize a pump.
    • Applying quadratic phase modulation to a probe signal in discrete time-bins.
    • Leveraging temporal Talbot array illuminator theory for CW-to-pulse conversion.

    Main Results:

    • Achieved CW-to-pulse conversion gains up to 12.
    • Demonstrated operation at repetition rates exceeding 16 GHz.
    • Showcased significant power savings compared to conventional parabolic TLs, especially at higher gains.

    Conclusions:

    • The proposed DM-TL design offers a more power-efficient alternative for optical signal processing.
    • This technology enables high-gain, high-repetition-rate conversion of CW signals to pulse trains.
    • The all-optical nature and reduced power demand position DM-TL for advanced photonic applications.