
297Materials for Lasers
Chapter 11
frequency doubling and tripling of ultrashort pulses from Ti:sapphire lasers, and also
for optical parametric conversions for high-power broadly tunable sources.
In 1988, Nakatani et al. measured single- and multiple-shot LIDT at 1064, 532, and
355nm, and obtained lower LIDT under multiple irradiations revealing a fatigue eect
of the crystal [78]. In 1999, Kouta et al. [68] reported bulk LIDTs under multiple irradia-
tions (10
4
shots at a repetition rate of 10Hz) of 45 J/cm
2
at 1064nm, 10 ns pulse width;
20.7 J/cm
2
at 532nm, 9 ns pulse width; 7.2 J/cm
2
at 355nm, 8 ns pulse width; and 2.4 J/cm
2
at 266nm, ...