
30
Laser-Induced Damage in Optical Materials
Assuming that T
max
equals the critical temperature of the material, T
cr
, the damage-
threshold uence F
0
takes the form
F
TK
D
cr h
0
31
=
.
.
τ
γ
(3.8)
Normalized to F
0
, damage threshold versus normalized absorber size dependence (Feit
and Rubenchik, 2004a) is plotted in Figure 3.1b. For each uence F > F
0
, there is a range of
the defect sizes a
min
< a < a
max
for which the host material is expected to fail. e result-
ing damage density may be found by integrating the absorber density between sizes a
min
and a
max
. e temperature behavior for the Gaussian pulse shape, I = I
0
exp[–(t/τ)
2
], with
the uence dened a ...