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Compact and efficient photonic lanterns through multi-stage tapering.

Lijie Hou, Linbo Yang, Zhiqun Yang

    Optics Letters
    |August 29, 2024
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a compact, multi-stage photonic lantern (PL) for mode-division multiplexing, significantly reducing crosstalk (XT) to below -23.4 dB over a short 6 cm length.

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    Area of Science:

    • Photonics and Optical Engineering
    • Telecommunications
    • Waveguide Technology

    Background:

    • Photonic lanterns (PLs) are crucial components in mode-division multiplexing (MDM) systems, offering low insertion loss, low mode-dependent loss (MDL), and wide bandwidth.
    • Enhancing crosstalk (XT) performance within short taper lengths remains a challenge for current PL designs.

    Purpose of the Study:

    • To propose and optimize a multi-stage cascaded scheme for short photonic lanterns.
    • To improve the crosstalk (XT) and loss performance of PLs in MDM systems.

    Main Methods:

    • A multi-stage cascaded design approach was employed for photonic lantern optimization.
    • Quantitative optimization was performed on a 6-mode, 3-stage tapered photonic lantern.

    Main Results:

    • The optimized 6-mode, 3-stage photonic lantern achieved a crosstalk (XT) below -23.4 dB.
    • The total length of the optimized photonic lantern was reduced to only 6 cm.
    • Experimental validation confirmed the feasibility of the 3-stage tapering process.

    Conclusions:

    • The proposed multi-stage cascaded scheme enables compact photonic lanterns with excellent XT performance.
    • This work presents the first quantitative optimization of a 3-stage tapered PL, demonstrating a viable path for advanced MDM systems.