<div class="csl-bib-body">
<div class="csl-entry">Ajami, A., Rafique, M. S., Pucher, N. U., Bashir, S., Husinsky, W., Liska, R., Inführ, R., Lichtenegger, H., Stampfl, J., & Lüftenegger, S. (2008). Z-scan measurements of two-photon absorption for ultrashort laser radiation. In T. Dreischuh, E. Taskova, E. Borisova, & A. Serafetinides (Eds.), <i>15th International School on Quantum Electronics: Laser Physics and Applications</i> (Issue 70271H, pp. 1–8). SPIE. https://doi.org/10.1117/12.822530</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/171008
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dc.description.abstract
We have developed a low cost apparatus for open- and closed-aperture Z-scan measurements of multi-photon absorption (MPA) cross-sections of solid and liquid samples. The experimental setup uses simple diodes for light detection. The signals are recorded with a low-cost two-channel PC-scope. We have developed a LabView based software, which analyzes single laser pulses and allows averaging over several shots. First measurements on a CR-39 polymer demonstrated the functioning of the method.Furthermore, we have shown that for 25fsec ultra short pulses three-photon absorption (ThPa) must be considered in addition to two-photon absorption (TPA). The appropriate nonlinear absorption (TPA-, ThPA-) coefficients and the nonlinear refractive index can be obtained via a best fit of the data to theoretical curves, which have been derived and adapted for ThPA from formulas for TPA accessible in the literature.
en
dc.language.iso
en
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dc.subject
Ultra-short lasers
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dc.subject
nonlinear optics
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dc.subject
multi-photon absorption
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dc.subject
photo-polymerization
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dc.title
Z-scan measurements of two-photon absorption for ultrashort laser radiation
en
dc.type
Konferenzbeitrag
de
dc.type
Inproceedings
en
dc.relation.publication
15th International School on Quantum Electronics: Laser Physics and Applications
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dc.contributor.editoraffiliation
Institute of Electronics, Bulgarian Academy of Sciences
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dc.contributor.editoraffiliation
Bulgarian Academy of Sciences
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dc.contributor.editoraffiliation
Institute of Electronics, Bulgarian Academy of Sciences
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dc.description.startpage
1
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dc.description.endpage
8
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dc.type.category
Full-Paper Contribution
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tuw.booktitle
15th International School on Quantum Electronics: Laser Physics and Applications
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tuw.container.volume
7027
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tuw.container.issue
70271H
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tuw.relation.publisher
SPIE
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tuw.publication.orgunit
E134-03 - Forschungsbereich Atomic and Plasma Physics
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tuw.publication.orgunit
E163-02-1 - Forschungsgruppe Polymerchemie und Technologie
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tuw.publisher.doi
10.1117/12.822530
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dc.description.numberOfPages
8
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tuw.editor.orcid
0000-0003-3730-0405
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tuw.editor.orcid
0000-0001-9204-5342
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tuw.editor.orcid
0000-0002-4844-6066
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tuw.event.name
15TH INTERNATIONAL SCHOOL ON QUANTUM ELECTRONICS: LASER PHYSICS AND APPLICATIONS
