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OAM light propagation through tissue.

Netanel Biton1, Judy Kupferman2, Shlomi Arnon2

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Light beams with orbital angular momentum (OAM) show improved transmission through diffuse media like biological tissue. Higher OAM modes enhance light penetration, benefiting optical imaging and communication applications.

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Area of Science:

  • Optics
  • Biomedical Engineering
  • Photonics

Background:

  • Light scattering in diffuse media poses challenges for optical communication and imaging.
  • Orbital angular momentum (OAM) beams demonstrate potential for deeper penetration than Gaussian beams.

Purpose of the Study:

  • To experimentally investigate the transmission of OAM beams through biological tissue.
  • To quantify the enhancement in transmittance for OAM beams compared to Gaussian beams.
  • To develop a mathematical model for improved light permeability.

Main Methods:

  • Transmission experiments using OAM beams with modes up to 20 through biological tissue samples up to 2.6 cm thick.
  • Comparison of OAM beam transmittance with that of Gaussian beams.
  • Development of a mathematical model to explain observed permeability.

Main Results:

  • OAM beams exhibited higher transmittance through diffuse biological tissue than Gaussian beams.
  • Transmittance increased with higher OAM modes, up to order 20.
  • At 2.6 cm tissue thickness, OAM beams of order 20 showed nearly 30% more power than Gaussian beams.

Conclusions:

  • OAM beams offer superior light transmission through highly scattering biological media.
  • This finding supports the use of OAM beams in optical wireless communication for medical implants.
  • OAM beams show promise for advanced optical biological imaging and medical diagnosis.