Hollow fibers for transmitting CO<sub>2</sub> laser light were fabricated by the chemical vapor deposition (CVD) method. A dielectric film of copper oxide (Cu<sub>2</sub>O) 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 Cu<sub>2</sub>O and had a bore diameter of 700 μm, showed a loss of 0.9 dB/m for CO<sub>2</sub> laser light. The Cu<sub>2</sub>O 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
Yuji Matsuura, Daisuke Miura, and Mitsunobu Miyagi, "Fabrication of Copper Oxide-Coated Hollow Waveguides for CO2 Laser Radiation," Appl. Opt. 38, 1700-1703 (1999)