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Proceedings Paper

Estimation of ultrashort laser irradiation effect over thin transparent biopolymer films morphology
Author(s): A. Daskalova; C. Nathala; I. Bliznakova; D. Slavov; W. Husinsky
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Paper Abstract

The collagen – elastin biopolymer thin films treated by CPA Ti:Sapphire laser (Femtopower – Compact Pro) at 800nm central wavelength with 30fs and 1kHz repetition rate are investigated. A process of surface modifications and microporous scaffold creation after ultrashort laser irradiation has been observed. The single–shot (N=1) and multi–shot (N<1) ablation threshold values were estimated by studying the linear relationship between the square of the crater diameter D2 and the logarithm of the laser fluence F for determination of the threshold fluences for N=1, 2, 5, 10, 15 and 30 number of laser pulses. The incubation analysis by calculation of the incubation coefficient ξ for multi – shot fluence threshold for selected materials by power – law relationship form Fth(N)=Fth(1)Nξ-1 was also obtained. In this paper, we have also shown another consideration of the multi – shot ablation threshold calculation by logarithmic dependence of the ablation rate d on the laser fluence. The morphological surface changes of the modified regions were characterized by scanning electron microscopy to estimate the generated variations after the laser treatment.

Paper Details

Date Published: 8 January 2015
PDF: 7 pages
Proc. SPIE 9447, 18th International School on Quantum Electronics: Laser Physics and Applications, 94470I (8 January 2015); doi: 10.1117/12.2177662
Show Author Affiliations
A. Daskalova, Institute of Electronics (Bulgaria)
C. Nathala, Technische Univ. Wien (Austria)
Femtolasers Productions GmbH (Austria)
I. Bliznakova, Institute of Electronics (Bulgaria)
D. Slavov, Institute of Electronics (Bulgaria)
W. Husinsky, Technische Univ. Wien (Austria)

Published in SPIE Proceedings Vol. 9447:
18th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Sanka Gateva; Alexandros Serafetinides, Editor(s)

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