Related Experiment Video
Updated: Aug 20, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Diode pumping of a continuous-wave Pr3+-doped LiYF4 laser
A Richter1, E Heumann, E Osiac
1University of Hamburg, Institute of Laser-Physics, Luruper Chaussee 149, D-22761 Hamburg, Germany. andricht@physnet.uni-hamburg.de
Abstract:
We report, for the first time to our knowledge, diode-pumped cw laser oscillation of Pr3+:LiYF4 in the red spectral range. The pump power is provided by a GaN laser diode emitting a maximum output power of 25 mW at a wavelength of approximately 442 nm. The Pr3+ laser emits 1.8 mW of output power at a 639.7-nm wavelength. Threshold pump power and slope efficiency in a nonoptimized setup are determined to be 5.5 mW and 24%, respectively.
Related Concept Videos
Diode: Reverse bias
Biasing of P-N Junction
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...

