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Proceedings Paper

Liquid-core fused silica capillary lightguides for applications in the UV/VIS and NIR spectral range
Author(s): Joerg Meister; Stefan Diemer; Roland Jung; Sandra Klein; Werner Fuss; Peter Hering
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Paper Abstract

Fused silica capillaries proved to be a suitable cladding material for liquid core lightguides. They have small diameters, a good mechanical stability and a high flexibility. Due to these properties such lightguides can be used for applications in minimally invasive surgery for endoscopical treatments. Filled with carbontetrachloride (CCl4), the optical properties were investigated spectrometrically and with various lasers. The transmission measurements of straight and 180 degree bent fibers were performed with a free-running Er:YAG, Er:YSGG, Ho:YAG, and Nd:YAG laser. Due to an overlap of the refractive indices of CCl4 and fused silica between 500 nm and 1 micrometer, laser wavelengths in this spectral range, e.g., of the Nd:YAG and the HeNe laser, cannot be transmitted in this lightguide. If the core liquid is a mixture of CCl4 and tetrachloroethylene (C2Cl4) the lightguide is transparent from the near UV (380 nm) up to the NIR (3 micrometer) and consequently, it is suitable also for the Nd:YAG laser. With the CCl4-filled fused silica capillaries distal energy densities up to 30 J/cm2 were achieved and thus the ablation threshold of soft tissue is exceeded.

Paper Details

Date Published: 18 April 1997
PDF: 9 pages
Proc. SPIE 2977, Specialty Fiber Optics for Biomedical and Industrial Applications, (18 April 1997); doi: 10.1117/12.271019
Show Author Affiliations
Joerg Meister, Institut fur Lasermedizin/Heinrich-Heine-Univ. Duesseldorf (Germany)
Stefan Diemer, Institut fur Lasermedizin/Heinrich-Heine-Univ. Duesseldorf (Germany)
Roland Jung, Institut fur Lasermedizin/Heinrich-Heine-Univ. Duesseldorf (Germany)
Sandra Klein, Institut fur Lasermedizin/Heinrich-Heine-Univ. Duesseldorf (Germany)
Werner Fuss, Institut fur Lasermedizin/Heinrich-Heine Univ. Duesseldorf and Max-Planck-Institut fur Quantenoptik (Germany)
Peter Hering, Institut fur Lasermedizin/Heinrich-Heine Univ. Duesseldorf and Max-Planck-Institut fur Quantenoptik (Germany)

Published in SPIE Proceedings Vol. 2977:
Specialty Fiber Optics for Biomedical and Industrial Applications
Abraham Katzir; James A. Harrington, Editor(s)

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