The role of skew rays in biomedical sensing

Idan Steinberg, Eran Kaplan, Moshe Ben-David, Israel Gannot

Research output: Contribution to journalArticle

Abstract

Hollow core waveguides are useful tools in biomedical optics both for transmission of radiation to the tissue to perform intervention and to sensing tissue optical parameters for diagnostics. These waveguides can also be used as an interaction chamber for sensing the presence and concentration of different aerosols and gases. To support the design and analyzing of such a device, we developed a computerized, ray tracing simulation. As aerosol particles tend to aggregate near the waveguides wall, the role of skew rays (i.e., rays that follow a helical path inside the waveguide) is investigated here and compared with merdional rays, which zigzag through the optical axis. To test quantitatively the sensing quality of different types of beam, a measure for the beam-sensing quality is developed. As first step, the validation of the simulation results is presented. Then, a compression between the sensing quality of Guassian, ring-like, and Bessel beam is made. These results allow the optimization of ray coupling to a hollow core waveguide-based, aerosol-sensing devices.

Original languageEnglish (US)
Article number5371985
Pages (from-to)961-966
Number of pages6
JournalIEEE Journal on Selected Topics in Quantum Electronics
Volume16
Issue number4
DOIs
StatePublished - Jul 1 2010
Externally publishedYes

Keywords

  • Aerosol sensing
  • Bessel beam
  • axicon
  • hollow core waveguides (HCWs)
  • ray-tracing simulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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