Experimental characterization of shock wave driven by high power nanosecond pulsed laser in water

2010 ◽  
Author(s):  
M. H. Mahdieh ◽  
M. Nikbakht ◽  
S. Yazdani
Keyword(s):  
Shock Wave ◽  
High Power ◽  
Pulsed Laser ◽  
Experimental Characterization ◽  
Nanosecond Pulsed Laser

Early Dynamics of a Laser-induced Underwater Shock Wave

2021 ◽  
Author(s):  
Guihua Lai ◽  
Siyuan Geng ◽  
Hanwen Zheng ◽  
Zhifeng Yao ◽  
Qiang Zhong ◽  
...  
Keyword(s):  
Shock Wave ◽  
Numerical Method ◽  
Cavitation Bubble ◽  
Laser Energy ◽  
Optical Breakdown ◽  
Pulsed Laser ◽  
Underwater Shock Wave ◽  
Time Resolved ◽  
High Attenuation ◽  
Nanosecond Pulsed Laser

Abstract The objective of this paper is to observe and investigate the early evolution of the shock wave, induced by a nanosecond pulsed laser in still water. A numerical method is performed to calculate the propagation of the shock wave within 1µs, after optical breakdown, based on the Gilmore model and the Kirkwood-Bethe hypothesis. The input parameters of the numerical method include the laser pulse duration, the size of the plasma and the maximally extended cavitation bubble, which are measured utilizing a high time-resolved shadowgraph system. The calculation results are verified by shock wave observation experiments at the cavitation bubble expansion stage. The relative errors of the radiuses and the velocity of the shock wave front, reach the maximum value of 45% at 5 ns after breakdown and decrease to less than 20% within 20 ns. The high attenuation characteristics of the shock wave after the optical breakdown, are predicted by the numerical method. The quick time and space evolution of the shock wave are carefully analyzed. The normalized shock wave width is found to be independent of the laser energy and duration, and the energy partitions ratio is around 2.0 using the nanosecond pulsed laser.

Characterization of Ag and Au nanoparticles created by nanosecond pulsed laser ablation in double distilled water

2011 ◽  
Vol 257 (12) ◽  
pp. 5278-5282 ◽  
Author(s):  
A.S. Nikolov ◽  
N.N. Nedyalkov ◽  
R.G. Nikov ◽  
P.A. Atanasov ◽  
M.T. Alexandrov
Keyword(s):  
Laser Ablation ◽  
Au Nanoparticles ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Distilled Water ◽  
Nanosecond Pulsed Laser

Characterization of sub-nanosecond pulsed laser amplification with Er:Yb co-doped phosphate glass fibers

2020 ◽  
Vol 45 (18) ◽  
pp. 5291
Author(s):  
Omri Moschovitz ◽  
Nadia G. Boetti ◽  
Diego Pugliese ◽  
Duccio Gallichi-Nottiani ◽  
Daniel Milanese ◽  
...  
Keyword(s):  
Phosphate Glass ◽  
Glass Fibers ◽  
Pulsed Laser ◽  
Nanosecond Pulsed Laser ◽  
Laser Amplification ◽  
Co Doped

Structural and morphological characterization of TiO2 nanostructured films grown by nanosecond pulsed laser deposition

2009 ◽  
Vol 255 (10) ◽  
pp. 5267-5270 ◽  
Author(s):  
M. Walczak ◽  
E.L. Papadopoulou ◽  
M. Sanz ◽  
A. Manousaki ◽  
J.F. Marco ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Morphological Characterization ◽  
Laser Deposition ◽  
Nanostructured Films ◽  
Nanosecond Pulsed Laser

Experimental characterization of an off-axis scheme for pumping high-power photonic crystal fiber lasers

2014 ◽  
Vol 114 (3) ◽  
pp. 327-331 ◽  
Author(s):  
Boris Rosenstein ◽  
Avry Shirakov ◽  
Daniel Belker ◽  
Amiel A. Ishaaya
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
High Power ◽  
Fiber Lasers ◽  
Experimental Characterization ◽  
Crystal Fiber

High-Power and High-Efficiency Widely Tunable Ti∶sapphire Nanosecond pulsed Laser Pumped by Q-Switched Green Laser

2019 ◽  
Vol 46 (5) ◽  
pp. 0508018
Author(s):  
李隆普 Li Longpu ◽  
李玉娇 Li Yujiao ◽  
宋艳洁 Song Yanjie ◽  
张申金 Zhang Shenjin ◽  
宗楠 Zong Nan ◽  
...  
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Pulsed Laser ◽  
Green Laser ◽  
Nanosecond Pulsed Laser

Nanocrystalline silicon and carbon nanotube nanocomposites prepared by pulsed laser fragmentation

2008 ◽  
Vol 80 (11) ◽  
pp. 2513-2520 ◽  
Author(s):  
Vladimir Švrček
Keyword(s):  
Carbon Nanotube ◽  
Pulsed Laser ◽  
Polymer Nanocomposite ◽  
Blue Shift ◽  
Nanocrystalline Silicon ◽  
Surface Wetting ◽  
Nanosecond Pulsed Laser ◽  
High Laser ◽  
Phosphorus Doped

This paper outlines the synthesis of nanocrystalline silicon (nc-Si) by nanosecond pulsed laser fragmentation of Si micrograins in liquid solutions, and characterization of the products. We compare micrograin fragmentations in deionized water, and in undoped and phosphorus-doped ethylpolysilicate (C2H5O[SiO(C2H5O)2]n C2H5) based polymers. We show that dissolution and subsequent laser fragmentation of micrograins is more efficient in both polymeric media than in water. In the case of water, micrograin surface wetting by ethanol prior to introduction into water is essential to achieve fragmentation. Prepared nc-Si/polymer nanocomposites display visible photoluminescence (PL) (~430 nm) at room temperature. The phosphorus polymer induces a blue shift of the PL peak. In addition, induced shock waves generated at sufficiently high laser irradiation intensities (>4.3 mJ/pulse) cause carbon nanotube (CNT) cavities to be filled by freshly prepared luminescent nc-Si/polymer nanocomposite.

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