
Transient Absorption Spectroscopy 497
0
7
6
5
4
3
2
1
0
51015
0.01
0.06
0.1
0.3
6
Normalized FWHM
(degree)
20 25
Figure 10.4 FWHM of W
t
(τ
d
) according to Eq. (10.9), normalized to its value at α = 0
◦
and
shown as a function of the half angle α between pump and probe pulse. The curves are depicted
for different values of the ratio of the geometrical pulse length and beam width, K = ν
g
τ
p
/d. The
sample thickness was chosen to be D = 3ν
g
τ
p
. For K = 0.1, a second curve for D = 10ν
g
τ
p
is also
shown for comparison (from Krueger [1]).
can be substantial, causing a loss in time resolution of a pump–probe experiment.
The effect of the crystal thickness, on the other hand, is ...