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Proceedings Paper

Flexible beam guiding in a microsurgical UV laser scalpel
Author(s): Georg Hillrichs; Hartmut Dietz; Martin Ruetting; Stanislaw Schastak; Peter Wiedemann; Yuji Matsuura; Mitsunobu Miyagi; Karl-Friedrich Klein
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Paper Abstract

Many potential microsurgical applications of UV laser radiation need a flexible beam guiding system. Especially for the argon fluorine excimer laser ((lambda) equals 193 nm) and for the 5th harmonic of the Nd:YAG laser ((lambda) equals 213 nm) the use of optical fused silica fibers is difficult. In this work we designed and tested a laboratory prototype of a scalpel for surgical treatments of the retina based on UV laser ablation. To achieve the necessary flexibility and to provide laser fluences above the ablation threshold of retina we developed a new type of beam guiding device. A hollow core waveguide is used in combination with a short length of a special fused silica optical fiber to guide the laser beam. To increase the laser fluence at the distal scalpel tip and to achieve a very small cut width a fused silica fiber (core diameter 600 micrometers ) has been tapered down to a diameter of about 150 micrometers .

Paper Details

Date Published: 26 March 2002
PDF: 8 pages
Proc. SPIE 4616, Optical Fibers and Sensors for Medical Applications II, (26 March 2002); doi: 10.1117/12.463813
Show Author Affiliations
Georg Hillrichs, Fachhochschule Merseburg (Germany)
Hartmut Dietz, Fachhochschule Merseburg (Germany)
Martin Ruetting, Fachhochschule Merseburg (Germany)
Stanislaw Schastak, Univ. Eye Hospital Leipzig (Germany)
Peter Wiedemann, Univ. Eye Hospital Leipzig (Germany)
Yuji Matsuura, Tohoku Univ. (Germany)
Mitsunobu Miyagi, Tohoku Univ. (Japan)
Karl-Friedrich Klein, Fachhochschule Giessen-Friedberg (Germany)

Published in SPIE Proceedings Vol. 4616:
Optical Fibers and Sensors for Medical Applications II
Israel Gannot, Editor(s)

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