
14
Laser-Induced Damage in Optical Materials
Table 2.1 Summary of ermal Properties of Commonly Used Laser Window Materials
Material Specic Heat Conductivity Density Temperature Absorption Coefcient Thermal Diffusivity LIDT
C
p
K
σ
T
m
α
D CdT
/α
(J g
−1
K
−1
) (W cm
−1
K
−1
) (g cm
−3
) (°C) (cm
−1
) (cm
2
s
−1
) (J cm
−2
)
1.064μm
Fused silica 0.81 0.014 2.21 1610 s 10
−4
0.0075 1.1 × 10
7
BK7 0.86 0.011 2.51 719 s 10
−3
0.0051 4 × 10
5
LiNbO
3
0.61 0.046 4.64 1170 m 10
−2
0.015 5 × 10
4
Al
2
O
3
0.72 0.46 3.99 2015 m 2 × 10
−4
0.16 7 × 10
6
Diamond 6.1 22.0 3.51 1000 g 10
−4
1.03 6 × 10
7
2000 m 1.5 × 10
8
10.6μm
KCl 0.69 0.07 1.99 776 d 10
−4
0.047 3 × 10
6
NaCl 0.88 0.065 2.17 801 d 10
−4
0.034 ...