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  1. Home
  3. Real-time Mode-modulation Enhanced Stable Imaging Through Flexible Multimode Fiber.
  1. Home
  3. Real-time Mode-modulation Enhanced Stable Imaging Through Flexible Multimode Fiber.

Related Experiment Video

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
08:48

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

Published on: November 22, 2019

Real-time mode-modulation enhanced stable imaging through flexible multimode fiber.

Ning Zhan, Zhenming Yu, Liming Cheng

    Optics Express
    |June 11, 2026

    View abstract on PubMed

    Summary
    This summary is machine-generated.

    This study introduces a new method to stabilize flexible multimode fibers (MMFs) for high-resolution medical imaging. The technique rapidly calibrates fiber bending, enabling clear, real-time endoscopic visualization in dynamic environments.

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    Area of Science:

    • Biomedical Optics
    • Fiber Optics
    • Medical Imaging Technology

    Background:

    • Multimode fibers (MMFs) offer potential for ultra-thin, high-resolution endoscopes but suffer from dynamic instability and limited transmission.
    • Clinical application of MMFs is hindered by their susceptibility to bending-induced distortions and performance degradation.

    Purpose of the Study:

    • To develop a method for stable, high-fidelity, real-time imaging through flexible, ultra-thin MMFs.
    • To overcome dynamic instability and performance limitations of MMFs for minimally invasive endoscopy.

    Main Methods:

    • A rapid calibration routine (approx. 75 ms) identifies the MMF's bending state using focusing wavefront probes.
    • A pre-calculated database provides a corresponding singular vector for mode modulation.
  • Synchronous retrieval and projection of the singular vector excite intrinsic fiber modes for enhanced transmission.

    • Main Results:

    • Substantial improvements in image fidelity were achieved in dynamically flexing 40-µm and 105-µm-core MMFs.
    • Peak signal-to-noise ratio (PSNR) and structural similarity (SSIM) improved by up to 7.75 dB and 0.069 for digits.
    • Edge preservation index increased by 12.10% for biological specimen imaging.

    Conclusions:

    • The proposed method effectively stabilizes MMFs, overcoming the trade-off between miniaturization and image quality.
    • This technique provides a robust, fast solution, removing a critical barrier for MMF-based imaging.
    • Enables a practical pathway for deploying high-resolution, hair-thin fiber endoscopes in clinical settings.