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Proceedings Paper

Delivery of high-powered picosecond pulses in near-IR region by special silver hollow-glass waveguides
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Paper Abstract

Two types of flexible hollow waveguides -- cyclic olefin polymer-coated silver (COP/Ag) hollow glass waveguides and fluorocarbon polymer-coated silver (FCP/Ag) hollow glass waveguides -- specially prepared for the delivery of high power 1.06 micrometer radiation were investigated by using an oscillator-amplifier Nd:YAG laser system emitting a single pulse or a train of pulses. The length of an individual pulse was equal to 50 ps and the laser repetition rate was 2.5 Hz. The output single mode beam with a full divergence angle of 0.12 mrad was focused into the COP/Ag or FCP/Ag hollow glass waveguide and the radiation was transmitted through it under various conditions. Transmission/attenuation as a function of the input laser energy was measured together with the input/output time radiation characteristics and the spatial distribution of the output beam. The transmission losses for a straight waveguide were found to be 0.24 dB/m for COP/Ag and 0.38 dB/m for FCP/Ag hollow waveguides with the inner diameter of 1 mm. The maximum energy transmitted was 150 mJ for the train of pulses and 40 mJ for a single pulse from which follows the delivered power of 100 GW/cm2. The characteristics obtained make these waveguides very promising for the delivery of high-power laser pulses in medical and other applications.

Paper Details

Date Published: 21 April 1999
PDF: 11 pages
Proc. SPIE 3596, Specialty Fiber Optics for Medical Applications, (21 April 1999); doi: 10.1117/12.346724
Show Author Affiliations
Helena Jelinkova, Czech Technical Univ. (Czech Republic)
Mitsunobu Miyagi, Tohoku Univ. (Japan)
Jan Sulc, Czech Technical Univ. (Czech Republic)
Pavel Cerny, Czech Technical Univ. (Czech Republic)
You Wang, Tohoku Univ. (Japan)
Yi-Wei Shi, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 3596:
Specialty Fiber Optics for Medical Applications
Abraham Katzir; James A. Harrington, Editor(s)

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