Hongo A, Morosawa K, Matsumoto K, Shiota T, Hashimoto T
Appl Opt. 1992 Aug 20;31(24):5114-20. doi: 10.1364/AO.31.005114.
We have measured the transmittance of 3-kW CO(2) laser light through Ge-coated Ag hollow waveguides. The basic characteristics such as transmissivity, bending loss, and output-beam properties are described. A maximum laser power of 2.6 kW was delivered through a straight hollow waveguide that was 1.7 mm in diameter and 2 m long. Furthermore, 4-m-long waveguides were fabricated by joining two waveguides. Finally, preliminary experiments on welding steel plates were done with the light transmitted through the waveguide. Although the focusing properties of the output beam should be improved for practical laser processing, this type of waveguide is promising for high-power CO(2) laser-light transmission.
我们测量了3千瓦二氧化碳激光通过镀锗银空心波导的透过率。描述了诸如透射率、弯曲损耗和输出光束特性等基本特性。通过一根直径1.7毫米、长2米的直空心波导传输的最大激光功率为2.6千瓦。此外，通过连接两根波导制作了4米长的波导。最后，利用通过波导传输的光对钢板进行了焊接的初步实验。尽管对于实际的激光加工，输出光束的聚焦特性有待改善，但这种类型的波导在高功率二氧化碳激光传输方面很有前景。
