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Proceedings Paper

Mechanism of internal modification in bulk borosilicate glass with picosecond laser pulses at high repetition rates
Author(s): Mingying Sun; Urs Eppelt; Wolfgang Schulz; Jianqiang Zhu
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Paper Abstract

We present a numerical model of internal modification in bulk borosilicate glass by high repetition rate picosecond laser pulses. We study free-electron dynamics, nonlinear energy deposition and thermal conduction. The optical absorptivity and modification regions both have good agreements with the experimental results. The smooth outer zone is the molten region and the inner-structure formation is caused by high-density free-electrons generated by thermal ionization. Excitation, relaxation and accumulation of free-electron density in the focal volume are analyzed using different pulse shapes and a double-pulse train. The deposited energy distribution and modification zone are controlled by pulse shaping.

Paper Details

Date Published: 14 July 2015
PDF: 13 pages
Proc. SPIE 9532, Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers, 953214 (14 July 2015); doi: 10.1117/12.2185518
Show Author Affiliations
Mingying Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Urs Eppelt, Fraunhofer-Institut für Lasertechnik (Germany)
RWTH Aachen Univ. (Germany)
Wolfgang Schulz, Fraunhofer-Institut für Lasertechnik (Germany)
RWTH Aachen Univ. (Germany)
Jianqiang Zhu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9532:
Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers
Jianda Shao; Takahisa Jitsuno; Wolfgang Rudolph; Meiping Zhu, Editor(s)

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