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Parametric wavelength conversion with bidirectional utilization of a multiple QPM device.

Masaki Asobe, Saroeun Punhavan, Masato Kato

    Optics Express
    |October 7, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel nonlinear optical device for efficient wavelength conversion and optical amplification. The method utilizes a multiple-quasi-phase-matched lithium niobate waveguide for high-capacity optical transmission.

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    Area of Science:

    • Nonlinear optics
    • Integrated photonics
    • Optical communications

    Background:

    • Wavelength conversion and optical amplification are crucial for high-capacity optical transmission.
    • Existing methods often face limitations in bandwidth and efficiency.
    • Parametric interactions in nonlinear optical devices offer a promising avenue for advanced optical signal processing.

    Purpose of the Study:

    • To propose and demonstrate a novel configuration for wavelength conversion and optical amplification.
    • To enable pump generation via second harmonic generation (SHG), difference frequency generation (DFG), and optical parametric amplification (OPA).
    • To utilize a multiple-quasi-phase-matched (M-QPM) LiNbO3 waveguide for bidirectional operation.

    Main Methods:

    • Employing a bidirectional M-QPM LiNbO3 waveguide for parametric interactions.
    • Implementing pump generation through SHG, DFG, and OPA processes.
    • Experimentally demonstrating wavelength conversion in the 1.4-1.6 µm band.

    Main Results:

    • Successful demonstration of wavelength conversion across the 1.4-1.6 µm band.
    • Validation of tunable parametric gain bandwidth by adjusting detunings between pump and quasi-phase-matching (QPM) wavelengths.
    • Achieved bidirectional operation for both DFG and OPA processes.

    Conclusions:

    • The proposed configuration offers an effective solution for wavelength conversion and optical amplification.
    • The demonstrated tunability of the parametric gain band enhances flexibility for optical transmission.
    • This method is valuable for enabling high-capacity optical transmission beyond the conventional 1550-nm band.