[摘要]：We report the preparation and characterization of an attenuated total reflection (ATR) GeO2 hollow waveguide. An internally GeO2-coated silica glass tube (bore size 1.0-1.2 mm, length 1.2 m) was prepared using a homogeneous liquid phase deposition method. Kramers-Kronig analysis reveals that the GeO2 cladding material qualifies as a reflective layer (n(r)<1) for the ATR hollow waveguide structure. ATR-transmission of 9.6-11.7 mu m light through HE11 mode is confirmed by loss spectrum analysis of the sample. The straight and bending (30 degrees) transmission losses for delivery of a similar to 40 W CO2 laser beam (10.6 mu m) are 0.56 dB/m and 1.64 dB/m, respectively. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3653470]
