High-energy extraction to nanosecond laser pulses from a 60-cm-aperture KrF laser amplifier

2001 ◽  
Vol 72 (7) ◽  
pp. 897-899 ◽  
Author(s):  
I. Okuda ◽  
E. Takahashi ◽  
Y. Owadano
Keyword(s):  
Laser Pulses ◽  
High Energy ◽  
Nanosecond Laser ◽  
Energy Extraction ◽  
Laser Amplifier ◽  
Krf Laser ◽  
Nanosecond Laser Pulses

scholarly journals Graphitization and amorphization of textured carbon using high-energy nanosecond laser pulses

Carbon ◽  
2016 ◽  
Vol 105 ◽  
pp. 227-232 ◽  
Author(s):  
Loïc Loisel ◽  
Marc Châtelet ◽  
Guillaume Giudicelli ◽  
Mathias Lebihain ◽  
Yi Yang ◽  
...  
Keyword(s):  
Laser Pulses ◽  
High Energy ◽  
Nanosecond Laser ◽  
Nanosecond Laser Pulses

scholarly journals High energy nanosecond laser pulses delivered single-mode through hollow-core PBG fibers

2004 ◽  
Vol 12 (4) ◽  
pp. 717 ◽  
Author(s):  
J. D. Shephard ◽  
J. D. C. Jones ◽  
D. P. Hand ◽  
G. Bouwmans ◽  
J. C. Knight ◽  
...  
Keyword(s):  
Single Mode ◽  
Laser Pulses ◽  
High Energy ◽  
Nanosecond Laser ◽  
Hollow Core ◽  
Nanosecond Laser Pulses

scholarly journals Vapor Breakdown During ablation by Nanosecond Laser Pulses

1995 ◽  
Vol 388 ◽  
Author(s):  
C. L. Liu ◽  
J. N. Leboeuf ◽  
R. F. Wood ◽  
D. B. Geohegan ◽  
J. M. Donato ◽  
...  
Keyword(s):  
Electron Impact ◽  
Excited States ◽  
Laser Pulses ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Rate Equations ◽  
Nanosecond Laser ◽  
Heavy Body ◽  
Krf Laser ◽  
Nanosecond Laser Pulses

AbstractPlasma generation through vapor breakdown during ablation of a Si target by nanosecond KrF laser pulses is modeled using 0-dimensional rate equations. although there is some previous work on vapor breakdown by microsecond laser pulses, there have been no successful attempts reported on the same subject by nanosecond laser pulses. This work intends to fill the gap. a kinetic model is developed considering the following factors: (1) temperatures of both electrons and heavy-body particles (ions, neutrals, and excited states of neutrals), (2) absorption mechanisms of the laser energy such as inverse bremstrahlung (IB) processes and photoionization of excited states, (3) ionization acceleration mechanisms that include electron-impact excitation of ground state neutrals, electron-impact ionization of excited states of neutrals, photoionization of excited states of neutrals, and all necessary reverse processes. the rates of various processes considered are calculated using a second order predictor-corrector numerical scheme. the rate equations are solved for five quantities, namely, densities of electrons, neutrals, and excited states of neutrals, and the temperatures of electrons and heavy-body particles. the total breakdown times (sum of evaporation time and vapor breakdown time) at different energy fluences are then calculated. the results are compared with experimental observations of Si target ablation using a KrF laser.

Front end of the high-energy Nd:glass laser fusion system with shaped nanosecond laser pulses

2001 ◽  
Author(s):  
Victor N. Chernov ◽  
Alexander V. Charukchev ◽  
Roman F. Kurunov ◽  
Vladimir A. Malinov ◽  
Nikolai V. Nikitin ◽  
...  
Keyword(s):  
Laser Pulses ◽  
High Energy ◽  
Laser Fusion ◽  
Nanosecond Laser ◽  
Fusion System ◽  
Front End ◽  
Nanosecond Laser Pulses ◽  
Nd:Glass Laser

Formation of Periodical Sub-Micron Sized Structures on Silicon by Interfered Nanosecond Laser Pulses

2010 ◽  
Vol 97-101 ◽  
pp. 3803-3806
Author(s):  
Yong Xiang Hu ◽  
Heng Zhang ◽  
Zheng Qiang Yao
Keyword(s):  
Cost Effective ◽  
Laser Pulses ◽  
Laser Beams ◽  
Nanosecond Laser ◽  
Effective Technique ◽  
First Order ◽  
Direct Fabrication ◽  
Cost Effective Technique ◽  
Nanosecond Laser Pulses ◽  
Micro Structuring

Laser interference micro-structuring is a relatively efficient and cost-effective technique for fabricating periodical micro-nano-structuring surfaces. The direct fabrication of sub-micron sized dot array on silicon was performed by four interfering nanosecond laser beams with a diffractive beam splitter. The mechanism to form the dot array was analyzed and it was found that the obtained conical dot array had a negative shape of the interference pattern of four laser beams. A second-order peak between two first-order peaks also occurred due to the liquid-solid expansion.

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