Evanescent wave delivery into a precise tissue area using fiber-optic probes

I. K. Ilev, R. W. Waynant, M. A. Bonaguidi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We demonstrate a novel all-optical-fiber system for infrared (IR) laser radiation delivery into a precise tissue area. The operating principal of the laser delivery system is based on the use of a direct laser-to-taper coupling and an IR delivery fiber with angle-shaped tip. In our experiment, instead of a conventional lens-based laser-to-fiber coupling we use an uncoated glass hollow taper for a laser-to-fiber coupling. It is a funnel-shaped grazing-incidence-based hollow taper. The laser emission is launched directly, without any focusing elements, into the taper and next into the delivery fiber by a direct taper-to-fiber coupling. The IR fiber delivers the forward emission from a Er:YAG laser (λ=2.94 μm) to the tissue to be treated. Moreover, in order to realize a regime of evanescent wave delivery, we use a specially shaped fiber tip with an angled (porro-prism) profile. When the fiber tip is out of the tissue area, the laser emission is backreflected at the angled tip due to total-internal-reflection. However, when the fiber tip is placed on absorbing tissue, it becomes "transparent" for laser emission because of the frustrated-total-internal-reflectance and the energy then is coupled into the absorber. When sufficient energy is transferred, dermatology or other precise surgical processes can be controlled or stopped.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsI. Gannot
Pages161-167
Number of pages7
Volume4253
DOIs
StatePublished - 2001
Externally publishedYes
EventOptical Fibers and Sensors for Medical Applications - San Jose, CA, United States
Duration: Jan 20 2001Jan 21 2001

Other

OtherOptical Fibers and Sensors for Medical Applications
CountryUnited States
CitySan Jose, CA
Period1/20/011/21/01

Fingerprint

evanescent waves
Fiber optics
fiber optics
delivery
Tissue
fibers
Fibers
probes
tapering
Lasers
lasers
Infrared radiation
hollow
Dermatology
dermatology
funnels
Infrared lasers
Laser radiation
Prisms
grazing incidence

Keywords

  • Evanescent wave delivery
  • Grazing incidence
  • Hollow taper
  • Optical fiber

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Ilev, I. K., Waynant, R. W., & Bonaguidi, M. A. (2001). Evanescent wave delivery into a precise tissue area using fiber-optic probes. In I. Gannot (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4253, pp. 161-167) https://doi.org/10.1117/12.427918

Evanescent wave delivery into a precise tissue area using fiber-optic probes. / Ilev, I. K.; Waynant, R. W.; Bonaguidi, M. A.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / I. Gannot. Vol. 4253 2001. p. 161-167.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ilev, IK, Waynant, RW & Bonaguidi, MA 2001, Evanescent wave delivery into a precise tissue area using fiber-optic probes. in I Gannot (ed.), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4253, pp. 161-167, Optical Fibers and Sensors for Medical Applications, San Jose, CA, United States, 1/20/01. https://doi.org/10.1117/12.427918
Ilev IK, Waynant RW, Bonaguidi MA. Evanescent wave delivery into a precise tissue area using fiber-optic probes. In Gannot I, editor, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4253. 2001. p. 161-167 https://doi.org/10.1117/12.427918
Ilev, I. K. ; Waynant, R. W. ; Bonaguidi, M. A. / Evanescent wave delivery into a precise tissue area using fiber-optic probes. Proceedings of SPIE - The International Society for Optical Engineering. editor / I. Gannot. Vol. 4253 2001. pp. 161-167
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