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Proceedings Paper

Transmission properties of hollow glass waveguides
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Paper Abstract

IR transmitting hollow waveguides are an attractive alterative to solid-core IR fibers. Hollow waveguides are made from silica glass or plastic tubing which has highly reflective coatings deposited on the inside surface. These guides have losses as low as 0.1 dB/m at 10.6 micrometer and may be bent to radii less than 5 cm. For laser-power delivery applications the hollow glass guides have been shown to be capable of transmitting up to 1 kW of CO2 laser power. In some power delivery applications it is necessary to have a distal tip configured to bend and/or concentrate the light for more efficient ablation. Curved tips (2 cm in length) are shown to increase the loss of a 1-m long straight guide from 22 to 34%. New research is described on the fabrication of coherent hollow glass bundles for IR imaging. The number of guides in the bundle is currently less than 20 but the results indicate that the hollow bundle can be coated to achieve an identical spectral response for each individual guide.

Paper Details

Date Published: 10 December 1999
PDF: 6 pages
Proc. SPIE 3849, Infrared Optical Fibers and Their Applications, (10 December 1999); doi: 10.1117/12.372796
Show Author Affiliations
Daniel J. Gibson, Rutgers Univ. (United States)
James A. Harrington, Rutgers Univ. (United States)


Published in SPIE Proceedings Vol. 3849:
Infrared Optical Fibers and Their Applications
Mohammed Saad; James A. Harrington, Editor(s)

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