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Proceedings Paper

Pulsed HF laser radiation transmission through fluorocarbon-polymer-coated silver hollow glass waveguides
Author(s): Alexander A. Serafetinides; Kenneth R. Rickwood; Nikoletta Anastasopoulou; You Wang; Yi-Wei Shi; Mitsunobu Miyagi
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Paper Abstract

Flexible fluorocarbon polymer-coated silver hollow glass waveguides, devised for the delivery of 3.0 micrometers radiation, were evaluated sing a plasma cathode HF laser emitting at 2.78 micrometers , in a 180 ns duration, at a 1 Hz repetition rate. A multimode beam of 10 mrad divergence at FWHM, was focused into the 700 micrometers diameter, 986 mm long waveguide and was transmitted through it under straight and various bent conditions. The straight transmission loss was found to be 0.9 dB/m, while the bent transmission losses varied from 2.0 dB/m (90 degree(s) bent -35 cm bending radius) to 2.4 dB/m (180 degree(s) bent -10 cm bending radius), for the range of measurements attempted. Transmission as a function of the laser energy input was also measured. Losses increased from 1.5 dB/m at 3 mJoules to 7.0 dB/m at 20 mJoules laser input. These attenuation characteristics at the wavelength of 2.78 micrometers make these waveguides very promising for pulsed radiation and tissue interactions in in vitro and in vivo trials.

Paper Details

Date Published: 1 January 1998
PDF: 9 pages
Proc. SPIE 3199, Biomedical Systems and Technologies II, (1 January 1998); doi: 10.1117/12.301120
Show Author Affiliations
Alexander A. Serafetinides, National Technical Univ. of Athens (Greece)
Kenneth R. Rickwood, National Technical Univ. of Athens (Greece)
Nikoletta Anastasopoulou, National Technical Univ. of Athens (Greece)
You Wang, Tohoku Univ. (Japan)
Yi-Wei Shi, Tohoku Univ. (Japan)
Mitsunobu Miyagi, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 3199:
Biomedical Systems and Technologies II
Francesco Baldini; Nathan I. Croitoru; Mark Russell Dickinson; Martin Frenz; Mitsunobu Miyagi; Riccardo Pratesi; Stefan Seeger, Editor(s)

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