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Proceedings Paper

The analysis of harmonic generation during ultrashort lR pulses filamentation in polymer
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Paper Abstract

We report the analysis of femtosecond laser modification of poly(methyl methacrylate) (PMMA) by detection of optical signals emitted from the sample coaxially with laser beam. The influence of pulse duration, energy and burst pattern on recorded spectra was investigated using TruMicro 2000 laser. We present images of internal structures in polymer as well as the spectra of conical emission created as result of laser – polymer interaction. Generation of a broadband continuum signal was detected and analysed in a function of position of the focal plane. Furthermore, third harmonic generation and second harmonic of fundamental 1030 nm wavelength was detected and the origin of these signals is discussed. We present possibility of the material modification process monitoring by in situ spectral analysis of light coming out from the sample. The deposited pulse energy fraction was analysed.

Paper Details

Date Published: 2 March 2020
PDF: 6 pages
Proc. SPIE 11268, Laser-based Micro- and Nanoprocessing XIV, 112681J (2 March 2020); doi: 10.1117/12.2545781
Show Author Affiliations
Bogusz D. Stepak, Wroclaw Univ. of Science and Technology (Poland)
Aleksander Budnicki, TRUMPF Laser GmbH (Germany)
Arkadiusz J. Antonczak, Wroclaw Univ. of Science and Technology (Poland)


Published in SPIE Proceedings Vol. 11268:
Laser-based Micro- and Nanoprocessing XIV
Udo Klotzbach; Akira Watanabe; Rainer Kling, Editor(s)

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