Abstract
For medical application by using the infrared laser, it is necessary to keeps high mechanical strength of
the hollow fibers. We chose a stainless tube as the base material for the hollow fibers. In order to reduce
roughness of inner surface of stainless tube which causes the additional transmission loss. We proposed
a new material to fabricate a low-loss-silver-hollow fiber based on a stainless tube. The new material is
an acrylic-silicon resin material which is used as a buffer polymer to the inner walls of stainless tubes for
a low-loss characteristic. We also discuss the transmission properties of visible pilot beam and Er: YAG
laser light in the silver-hollow fibers. The loss for the 550-μm-bore size, 1-m-length silver-hollow fiber
was 5.9dB under straight configuration, and 8.8dB under the configuration of a 180 degree bending with
a 20.25-mm bending radius at the wavelength of 650 nm.
