William Angerer - Department of Physics and Astronomy - University ...

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the transmitted wave, E:t'°,
The measured signal, I:t'° is
(2.21)
where
(2.22)
vVe observed Maker fringes by measuring the SHG intensity from a quartz wedge
excited by aNd: YAG pumped dye laser. By translating the quartz wedge through
the dye laser light, the phase difference between the bound and free waves changes
as the quartz thickness changes. Fig. 2.3 demonstrates the simplified experimental
geometry used to observe Maker fringes [411. Fig. 2.4 displays the Maker fringe data
and a fit to the data using equation (2.21). The salient feature of this fitting function
is that the intensity oscillates as a function of the phase velocity mismatch, (k bl - k /1),
times the crystal thickness, d.
2.4.2 Excitation with a Ultrafast Light Source
In linear optics, propagation of ultrafast laser pulses in dispersive media depends in
part on group velocity dispersion (GVD). In this phenomena, an ultrafast laser pulse
is broadened as it traverses a dispersive media. The pulse broadens more rapidly when
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