Record link: 
http://hdl.handle.net/20.500.12708/171008
-
Title: 
Z-scan measurements of two-photon absorption for ultrashort laser radiation
en
Citation: 
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.), 15th International School on Quantum Electronics: Laser Physics and Applications (Issue 70271H, pp. 1–8). SPIE. https://doi.org/10.1117/12.822530
-
Publisher DOI: 
10.1117/12.822530
-
Publication Type: 
Inproceedings - Full-Paper Contribution
en
Language: 
English
-
Authors: 
Ajami, Aliasghar 
Rafique, Muhammad Shahid 
Pucher, Niklas Ulrich 
Bashir, Shazia 
Husinsky, Wolfgang 
Liska, Robert 
Inführ, Robert 
Lichtenegger, H. 
Stampfl, J. 
Lüftenegger, Stfan 
-
Organisational Unit: 
E134-03 - Forschungsbereich Atomic and Plasma Physics 
E163-02-1 - Forschungsgruppe Polymerchemie und Technologie 
-
Published in: 
15th International School on Quantum Electronics: Laser Physics and Applications 
-
Volume: 
7027
-
Issue: 
70271H
-
Date (published): 
2008
-
Event name: 
15TH INTERNATIONAL SCHOOL ON QUANTUM ELECTRONICS: LASER PHYSICS AND APPLICATIONS 
-
Event date: 
15-Sep-2008 - 19-Sep-2008
-
Event place: 
Bourgas, Bulgaria
-
Number of Pages: 
8
-
Publisher: 
SPIE
-
Keywords: 
Ultra-short lasers; nonlinear optics; multi-photon absorption; photo-polymerization
-
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
Science Branch: 
Physik, Mechanik, Astronomie
Chemie
-
Appears in Collections:
Conference Paper

Show full item record

Page view(s)

68
checked on Nov 19, 2023

Google ScholarTM

Check