Optical radiation losses of metal-coated optical fibers at different wavelengths

A novel approach to the sensitive measurements of optical loss coefficients in metal-coated fibers in a wide wavelength range is introduced. It is based on measuring the change of temperature-dependent electrical resistance of the coating caused by laser radiation transmitted through the fiber. A number of single-mode and multimode metal-coated fibers were investigated using several laser sources operating in visible and near-infrared ranges. A...