Experimental study of mechanical response of artificial tissue models irradiated with Nd:YAG nanosecond laser pulses

2011 ◽  
Author(s):  
Francisco G. Pérez-Gutiérrez ◽  
Santiago Camacho-López ◽  
Guillermo Aguilar
Keyword(s):  
Experimental Study ◽  
Mechanical Response ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Artificial Tissue ◽  
Nanosecond Laser Pulses ◽  
Tissue Models

Time-resolved study of the mechanical response of tissue phantoms to nanosecond laser pulses

2011 ◽  
Vol 16 (11) ◽  
pp. 115001 ◽  
Author(s):  
Francisco G. Pérez-Gutiérrez ◽  
Santiago Camacho-López ◽  
Guillermo Aguilar
Keyword(s):  
Mechanical Response ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Time Resolved ◽  
Tissue Phantoms ◽  
Nanosecond Laser Pulses

Experimental study of the behaviour of narrow nanosecond laser pulses in biased photorefractive Bi12TiO20

1999 ◽  
Vol 223 (1) ◽  
pp. 381-388 ◽  
Author(s):  
Delphine Wolfersberger ◽  
Nicolas Fressengeas ◽  
Jean Maufoy ◽  
Godefroy Kugela
Keyword(s):  
Experimental Study ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Nanosecond Laser Pulses

Mechanical response of agar gel irradiated with Nd:YAG nanosecond laser pulses

2010 ◽  
Author(s):  
Francisco G. Pérez-Gutiérrez ◽  
Rodger Evans ◽  
Santiago Camacho-López ◽  
Guillermo Aguilar
Keyword(s):  
Mechanical Response ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Agar Gel ◽  
Nanosecond Laser Pulses

Time-Resolved Experimental Study of Silicon Carbide Ablation by Infrared Nanosecond Laser Pulses

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Yibo Gao ◽  
Yun Zhou ◽  
Benxin Wu ◽  
Sha Tao ◽  
Ronald L. Jacobsen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Silicon Carbide ◽  
Laser Pulse ◽  
Material Removal ◽  
Laser Pulses ◽  
Nanosecond Laser ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Time Resolved ◽  
Nanosecond Laser Pulses

Silicon carbide, due to its unique properties, has many promising applications in optics, electronics, and other areas. However, it is difficult to micromachine using mechanical approaches due to its brittleness and high hardness. Laser ablation can potentially provide a good solution for silicon carbide micromachining. However, previous studies of silicon carbide ablation by nanosecond laser pulses at infrared wavelengths are very limited on material removal mechanism, and the mechanism has not been well understood. In this paper, experimental study is performed for silicon carbide ablation by 1064 nm and 200 ns laser pulses through both nanosecond time-resolved in situ observation and laser-ablated workpiece characterization. This study shows that the material removal mechanism is surface vaporization, followed by liquid ejection (which becomes clearly observable at around 1 μs after the laser pulse starts). It has been found that the liquid ejection is very unlikely due to phase explosion. This study also shows that the radiation intensity of laser-induced plasma during silicon carbide ablation does not have a uniform spatial distribution, and the distribution also changes very obviously when the laser pulse ends.

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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