Related Experiment Video
Updated: May 8, 2026
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
High slope efficiency and high refractive index change in direct-written Yb-doped waveguide lasers with depressed
Guido Palmer1, Simon Gross, Alexander Fuerbach
1Centre for Ultrahigh bandwidth Devices for Optical Systems, MQ Photonics Research Centre, Department of Physics and Astronomy, Macquarie University, North Ryde, New South Wales 2109, Australia. guido.palmer@xfel.eu
Abstract:
We report the first Yb:ZBLAN and Yb:IOG10 waveguide lasers fabricated by the fs-laser direct-writing technique. Pulses from a Titanium-Sapphire laser oscillator with 5.1 MHz repetition rate were utilized to generate negative refractive index modifications in both glasses. Multiple modifications were aligned in a depressed cladding geometry to create a waveguide. For Yb:ZBLAN we demonstrate high laser slope efficiency of 84% with a maximum output power of 170 mW. By using Yb:IOG10 a laser performance of 25% slope efficiency and 72 mW output power was achieved and we measured a remarkably high refractive index change exceeding Δn = 2.3 × 10(-2).
