Phosphate glass samples with various Cr2O3, Yb2O3, and Er2O3 contents
based upon 67P(2)O(5). 14Al(2)O(3). 14Li(2)O . 1K(2)O.4(Yb2O3 + Er2O3)
were prepared. The effect of changing concentrations of Er3+ ions (0.
1-1.5 x 10(19) ions cm(-3)) and sensitizers Cr3+ ion and Yb3+ ion (2-1
6 x 10(18) ions cm(-3) and 1.35-2.3 x 10(21) ions cm(-3) respectively)
on laser performance were investigated. The thermal shock resistance
of this glass was doubled after an ion-exchange chemical strengthening
process in a KNO3/NaNO3 molten salt bath. Lasers with repetition rate
s of 20 Hz at free-running and 15 Hz at Q-switched single mode were de
monstrated by utilizing chemically strengthened laser glass rods. (C)
1998 Elsevier Science B.V. All rights reserved.