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Laser-Induced Damage in Optical Materials
book

Laser-Induced Damage in Optical Materials

by Detlev Ristau
December 2014
Intermediate to advanced content levelIntermediate to advanced
551 pages
23h 57m
English
CRC Press
Content preview from Laser-Induced Damage in Optical Materials
175Measurement and Detection of Laser-Induced Damage
Chapter 6
For a Gaussian beam with the following intensity prole,
Ixy
P
xy
(,)exp=−
+
()
2
2
22
2
πω
ω
(6.3)
where
P is the power of the beam
ω is the 1/e
2
intensity radius, the portion of laser beam transmitted through the knife-
edge P(a) can be given as
P(aI(x,y)dxdy
P
erfc
a
a
)
==
−∞
∫∫
2
2
ω
(6.4)
where erfc(x) is the complementary error function,
68
erfc(x) = 1 − erf(x).
Using Equation 6.4, it is possible to obtain theoretical result of unmasked power versus
knife movement distance, shown as the solid line in Figure 6.23. In addition, experimental
data (dotted line) using knife-edge method are a ...
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Publisher Resources

ISBN: 9781439872161