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
Original Manuscript: July 8, 1998
Revised Manuscript: October 19, 1998
Published: March 20, 1999
Yuji Matsuura, Daisuke Miura, and Mitsunobu Miyagi, "Fabrication of copper oxide–coated hollow waveguides for CO2 laser radiation," Appl. Opt. 38, 1700-1703 (1999)