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Design of flexible multi-mode fiber endoscope.

Ruo Yu Gu, Reza Nasiri Mahalati, Joseph M Kahn

    Optics Express
    |October 20, 2015
    PubMed
    Summary

    This study introduces a flexible multi-mode fiber (MMF) endoscope that can bend during use. This innovation allows for imaging in previously inaccessible areas without needing to know the MMF

    Area of Science:

    • Optical Engineering
    • Biomedical Optics
    • Fiber Optic Sensing

    Background:

    • Multi-mode fiber (MMF) endoscopes offer high resolution but are limited by rigidity or orientation requirements.
    • Current MMF endoscope designs restrict medical applications due to their inflexibility.
    • The need for adaptable endoscopic tools for minimally invasive procedures is growing.

    Purpose of the Study:

    • To develop a novel multi-mode fiber endoscope design enabling arbitrary bending during maneuverability.
    • To enable imaging through a flexible MMF endoscope without prior knowledge of its orientation.
    • To overcome the limitations of current MMF endoscopes in medical applications.

    Main Methods:

    • Incorporation of a partial reflector at the distal end of the MMF.

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  • Measurement of mode coupling within the MMF using reflected light at the proximal end.
  • Simulation of imaging through a flexible, step-index MMF with 1588 spatial modes.

    • Main Results:

    • Demonstration of successful imaging through an arbitrarily bent MMF.
    • Validation of the technique even with random alterations to the MMF's mode coupling matrix.
    • Successful imaging despite unknown bending of the MMF.

    Conclusions:

    • The proposed MMF endoscope design allows for flexible maneuvering and imaging in complex anatomical sites.
    • This technology expands the potential medical applications of MMF endoscopes.
    • The developed method enables imaging without the need for real-time orientation tracking of the endoscope tip.