Cyclic olefin polymer (COP) is newly used as the inner dielectric of infrared, hollow glass waveguides because of its low extinction coefficient in the mid-infrared region. A liquid-flow coating and dry-cure process are employed to form the COP layer on the inside of a silver-coated hollow glass tube. In the coating process, cyclohexane is chosen as the solvent of COP to form a smooth and uniform COP layer. It is shown that COP-coated silver hollow glass waveguides show low loss properties for CO<sub>2</sub>, CO, and Er:YAG laser light when the thickness of the COP layer is properly chosen.
© 1998 Optical Society of America
Yi-Wei Shi, You Wang, Yukio Abe, Yuji Matsuura, Mitsunobu Miyagi, Shunichi Sato, Manabu Taniwaki, and Hiroshi Uyama, "Cyclic Olefin Polymer-Coated Silver Hollow Glass Waveguides for the Infrared," Appl. Opt. 37, 7758-7762 (1998)