Polymer-coated silver hollow glass waveguides for delivery of first and second harmonic Nd: YAG laser picosecond pulses

摘要

Cyclic olefin polymer-coated silver hollow glass waveguides with inner diameters of 540 mum, 700 mum, and 1000 mum were used for transmission of single pulses in picosecond region generated by a high-power Nd:YAG laser system (wavelengths 1. 06 mum-first (fundamental) harmonic and 0.53 mum-second harmonic). Maximum first and second harmonic intensities delivered by 1000 mum inner diameter waveguide were 185 GW/cm~2 and 48 GW/cm~2, respectively. For fundamental radiation guided by the waveguide with the inner diameters 540 mum, and 700 mum the maximum measured transmitted intensities were 397 GW/cm~2 and 331 GW/cm~2, respectively. Temporal development with picosecond resolution, spatial profile, and divergence of delivered laser pulses were determiend for each waveguide.