Transmission properties of hollow glass waveguides

Daniel J. Gibson; James A. Harrington

doi:10.1117/12.372796

10 December 1999 Transmission properties of hollow glass waveguides

Proceedings Volume 3849, Infrared Optical Fibers and Their Applications; (1999) https://doi.org/10.1117/12.372796
Event: Photonics East '99, 1999, Boston, MA, United States

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.

Citation Download Citation

Daniel J. Gibson and James A. Harrington "Transmission properties of hollow glass waveguides", Proc. SPIE 3849, Infrared Optical Fibers and Their Applications, (10 December 1999); https://doi.org/10.1117/12.372796

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KEYWORDS

Glasses

Dielectrics

Waveguides

Carbon dioxide lasers

Optical fibers

Er:YAG lasers

Hollow waveguides

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