Low temperature diode pumped active mirror Yb^3+:YAG disk laser amplifier studies

Abstract

An experimental study of a static helium gas gap heat switch concept for laser amplification is presented. High single pass gains with large co-sintered ceramic Yb:YAG disks are recorded in the 80-200K temperature range on a diode pumped active mirror amplifier.

Overview of ytterbium based transparent ceramics for diode pumped high energy solid-state lasers

“…Compared to this first generation composite ceramics with Cr layer (0.25 at.%) having a radial thickness of 5 mm, second generation transparent ceramics with 20 mm radial thickness of Cr layer ( at.%) shows higher gain [48] . An increase in thickness and a decrease in doping level of Cr layer reduce the thermal concentration and thermally induced stress along the Yb /Cr interface.…”

A model for pumping optimization in edge-pumped disk amplifiers

“…These systems rely on compact amplifiers with efficient diode pumping and effective heat extraction. Many of the amplifier schemes currently under development use disks [13,14] in the so-called active mirror configuration [15][16][17], which represents an effective solution for high average power laser amplifiers, with cooling achieved from one of the disk faces. Main advantages follow from the large ratio between the cooling surface and the active volume and from the collinearity between the heat flux and laser beam axis.…”

Diode-Pumped 50 Hz–10 J Nano-Second Nd:YAG Laser

“…In recent years, 10 Hz nano-second laser has developed rapidly, and the output energy had increased from 10 J to 100 J [1][2][3][4][5][6][7]. However, at that energy level, higher frequency just as 50 Hz or even 100 Hz was not realized before 2020.…”