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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 34 — Dec. 1, 1997
  • pp: 9075–9082

Liquid-core light guides for near-infrared applications

Stefan Diemer, Jörg Meister, Roland Jung, Sandra Klein, Michael Haisch, Werner Fuss, and Peter Hering  »View Author Affiliations


Applied Optics, Vol. 36, Issue 34, pp. 9075-9082 (1997)
http://dx.doi.org/10.1364/AO.36.009075


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Abstract

The strong absorption of tissue water is responsible for the low ablation threshold for biological tissues at the Er:YAG and Er:YSGG laser wavelengths. These lasers are therefore considered to be promising tools for medical treatments. As the existing transmission systems are still unsatisfactory, three types of liquid-filled light guides are investigated here as alternatives to conventional near-IR fibers. In addition to mechanical advantages, the minimum attenuation is below 3 dB/m, and losses at bending radii down to 20 mm are negligible. The maximum output energy densities of 14.2 J/cm2 (free-running Er:YAG) or power densities of 7 MW/cm2 (Q-switched Er:YAG) are sufficient for soft-tissue ablation. When the liquid was circulated, much higher energy densities, exceeding the hard-tissue ablation threshold, were achieved. These properties make liquid-core light guides promising delivery systems for many near-IR applications, including medical ones.

© 1997 Optical Society of America

History
Original Manuscript: March 20, 1997
Revised Manuscript: June 25, 1997
Published: December 1, 1997

Citation
Stefan Diemer, Jörg Meister, Roland Jung, Sandra Klein, Michael Haisch, Werner Fuss, and Peter Hering, "Liquid-core light guides for near-infrared applications," Appl. Opt. 36, 9075-9082 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-34-9075

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