| 摘要 |
PURPOSE:To allow transmission at a low loss for all wavelengths of an Er:YAG laser, CO laser and CO2 laser by setting the dielectric material and film thickness of the dielectric-contg. metallic hollow optical waveguide to prescribed values. CONSTITUTION:For example, Ag 3 of 0.1 mum film thickness and Ge 4 of 0.5 mum film thickness are internally formed on the inside surface of an Ni pipe 2 of 200 mum thickness of the Ge-contg. Ag hollow optical waveguide 1. The thickness (d) of germanium is specified within the range of d=0.42 to 0.5 mum and the thickness is set at d=0.68 to 0.92 mum in the case of use of zinc selenide in order to transmit the three laser beams; the CO2 laser beam of 10.6 mum wavelength, the Er:YAG laser beam of 2.9 mum wavelength and the CO laser beam of 5.2 to 5.7 mum wavelength at a low loss in this case. All of three kinds of the laser beams are then transmitted at the low loss. The need for preparing the waveguides for each of the respective wavelengths is eliminated in this way. |
