Abstract

Hollow fibers for transmitting CO2 laser light were fabricated by the chemical vapor deposition (CVD) method. A dielectric film of copper oxide (Cu2O) was deposited upon the inside of a Ag-coated glass capillary by use of a metal acetylacetonate as the precursor. The waveguide, which was coated with Cu2O and had a bore diameter of 700 µm, showed a loss of 0.9 dB/m for CO2 laser light. The Cu2O film deposited by CVD had high chemical and heat resistivity. Therefore a hollow fiber coated with copper oxide is suitable for high-power laser applications in a severe environment.

© 1999 Optical Society of America

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