The pulsed and CW laser performance of a range of titanium sapphire la
ser crystals is reported, Titanium ion concentration in the crystals r
anged from 0.07 at.% to 0.25 and 0.41 at.% for some recently developed
heavily doped crystals. Values of the crystal figure of merit lay bet
ween 30 and 220, Threshold, slope efficiency, tunability, and temporal
response are assessed. Comparisons are made with the predictions of a
simple rate equation model.