Nd:YAG picosecond pulse delivery by cyclic olefin polymer-coated silver hollow glass waveguide

摘要

The flexible hollow waveguides - a cyclic olefin polymer- coated silver hollow glass waveguides with various inner diameters - specially prepared for the delivery of high power 1.06 $mu@m radiation were investigated using an oscillator-3 amplifiers Nd:YAG laser system. The length of a single pulse was equal to 50 psec. In dependence to a diameter of the waveguide, transmission/attenuation as a function of the input laser energy were measured together with the input/output time radiation characteristics and the spatial distribution of the output beam. The input energy up to 80 mJ, 70 mJ, and 30 mJ was transmitted with an efficiency higher that 90 percent for the COP/Ag hollow waveguides with a diameter of 1000 $mu@m, 700 $mu@m, and 540 $mu@m, respectively. The picosecond temporal measurements show that the delivered pulse duration was not changed within a resolution of 5 picosecond. Therefore the maximum transmitted power reached was 1.5 GW. The characteristics obtained make all these waveguides very promising for the delivery of high-power laser pulse in special medical and other applications.