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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1991),
  • paper CTuS5

Hollow sapphire fibers for the delivery of pulsed and cw CO2 laser radiation

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Abstract

Hollow single-crystal sapphire fibers have been used to deliver CO2, laser energy for applications involving cutting, welding, and laser surgery. The hollow sapphire fibers are 125-cm long and range in inner diameter from 250 to 1050 μm. The principle of operation of these fibers is based on the index of refraction n being less than 1 at 10.6 μm. With a n < 1 cladding inner layer and an air core, the hollow waveguide functions like a fiber. This structure is unlike the leaky, hollow metal waveguides in which significant mode mixing can result from bending the waveguides. In contrast, the sapphire fibers are single mode.

© 1991 Optical Society of America

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