Thermal effects caused by launching conditions in a CO2 laser beam delivery that uses metallic hollow waveguides is investigated. It is found that front-end clipping is the main cause of thermal loading and generates a steep temperature gradient at the fiber front end while the continuous beam attenuation produces a temperature distribution declining slowly along the waveguide.
© 1996 Optical Society of America
Daoning Su, Suripon Somkuarnpanit, Denis R. Hall, and Julian D. C. Jones, "Thermal effects in a hollow waveguide beam launch for CO2 laser power delivery," Appl. Opt. 35, 4787-4789 (1996)