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Related Experiment Video

Updated: Jun 12, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Multi-plane light conversion-based pump-signal combiner for ring-core fiber amplifiers.

Xiaoyu Yan, Heming Wei, Mengshi Zhu

    Optics Express
    |June 11, 2026
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel multi-plane light conversion (MPLC) device for efficiently combining pump and signal beams in ring-core erbium-doped fiber amplifiers (RC-EDFAs). The MPLC combiner enables high-fidelity, mode-specific amplification across multiple wavelengths.

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    Published on: November 22, 2019

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    Last Updated: Jun 12, 2026

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    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

    Published on: November 22, 2019

    Area of Science:

    • Optics and Photonics
    • Fiber Optics
    • Laser Technology

    Background:

    • Ring-core erbium-doped fiber amplifiers (RC-EDFAs) are crucial for advanced optical communication systems.
    • Simultaneously combining multi-wavelength pump and signal beams into specific spatial modes in RC-EDFAs presents a significant technical challenge.
    • Existing methods often lack the precision required for high-fidelity mode conversion and multiplexing.

    Purpose of the Study:

    • To propose and experimentally demonstrate a compact pump-signal combiner utilizing multi-plane light conversion (MPLC) technology.
    • To achieve efficient and simultaneous combination of multi-wavelength pump and signal beams into specific spatial modes of an RC-EDFA.
    • To validate MPLC as a high-fidelity solution for pump-signal multiplexing in advanced fiber amplifiers.

    Main Methods:

    • Development of a compact pump-signal combiner based on MPLC, optimized using a weighted wavefront matching algorithm.
    • Fabrication of the combiner using maskless grayscale lithography with 128-level phase quantization.
    • Integration of the MPLC combiner into an RC-EDFA system to test its performance with multiple spatial modes (LP01, LP11a, LP11b, LP21).

    Main Results:

    • Achieved small-signal gains exceeding 16 dB for all signal spatial modes, with a maximum gain of 20.7 dB for the LP21 mode.
    • Observed significant gain equalization in the saturation regime, reducing differential mode gain (DMG) to below 0.5 dB.
    • Demonstrated broadband amplification across the C-band (1530-1565 nm) with a DMG of approximately 3 dB.

    Conclusions:

    • The MPLC-based pump-signal combiner is a highly effective and compact solution for mode-specific multiplexing in RC-EDFAs.
    • MPLC technology offers high fidelity and excellent performance in terms of gain, gain equalization, and broadband amplification.
    • This approach represents a significant advancement for future optical communication systems relying on mode-division multiplexing.