scholarly journals Characteristics of Non‐Ablative Resurfacing of Soft Tissues by Repetitive Er:YAG Laser Pulse Irradiation

2021 ◽  
Author(s):  
Matjaz Lukac ◽  
Anze Zorman ◽  
Nejc Lukac ◽  
Tadej Perhavec ◽  
Blaz Tasic
Keyword(s):  
Laser Pulse ◽  
Soft Tissues ◽  
Er:Yag Laser ◽  
Pulse Irradiation

Silicon Bipolar Transistors Fabricated using Ion Implantation and Laser Annealing

1980 ◽  
Vol 1 ◽  
Author(s):  
Nobuyoshi Natsuaki ◽  
Takao Miyazaki ◽  
Makoto Ohkura ◽  
Toru Nakamura ◽  
Masao Tamura ◽  
...  
Keyword(s):  
Low Temperature ◽  
Laser Pulse ◽  
Laser Irradiation ◽  
Ruby Laser ◽  
Laser Annealing ◽  
Bipolar Transistors ◽  
Pulse Irradiation ◽  
Irradiation Effects ◽  
Furnace Annealing ◽  
Temperature Furnace

ABSTRACTBipolar transistors with laser annealed base and emitter, as well as those with furnace annealed base and laser annealed emitter, have been successfully fabricated using Q-switched ruby laser pulse irradiation. The performance of laser asannealed transistors is rather poor. However, it can be improved, to some extent, by relatively low temperature furnace annealing after laser irradiation. DC and RF characteristics of laser annealed transistors are presented in conjunction with laser irradiation effects on the characteristics of conventionally fabricated transistors.

Surface compositions of 9XC and R6M5 tool steels after laser pulse irradiation according to X-ray photoelectron spectroscopy data

2011 ◽  
Vol 5 (3) ◽  
pp. 431-439 ◽  
Author(s):  
A. T. Kozakov ◽  
S. I. Yares’ko ◽  
V. I. Kolesnikov ◽  
A. V. Sidashov
Keyword(s):  
Laser Pulse ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Data ◽  
Tool Steels ◽  
Pulse Irradiation ◽  
X Ray

scholarly journals Optodynamic energy-conversion efficiency during an Er:YAG-laser-pulse delivery into a liquid through different fiber-tip geometries

2012 ◽  
Vol 17 (7) ◽  
pp. 0750061 ◽  
Author(s):  
Peter Gregorčič ◽  
Matija Jezeršek ◽  
Janez Možina
Keyword(s):  
Laser Pulse ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Er:Yag Laser ◽  
Energy Conversion Efficiency

Generation of laser-induced periodic surface structures (LIPSS) in fused silica by single NIR nanosecond laser pulse irradiation in confinement

2019 ◽  
Vol 470 ◽  
pp. 56-62 ◽  
Author(s):  
Martin Ehrhardt ◽  
Bing Han ◽  
Frank Frost ◽  
Pierre Lorenz ◽  
Klaus Zimmer
Keyword(s):  
Laser Pulse ◽  
Fused Silica ◽  
Surface Structures ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Pulse Irradiation ◽  
Periodic Surface

scholarly journals Human Dental Enamel and Dentin Structural Effects after Er:yag Laser Irradiation

2014 ◽  
Vol 15 (3) ◽  
pp. 283-287 ◽  
Author(s):  
Mateus Rodrigues Tonetto ◽  
Marcelo Ferrarezi de Andrade ◽  
Shelon Cristina Souza Pinto ◽  
Darlon Martins Lima ◽  
José Roberto Cury Saad ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Soft Tissues ◽  
Er:Yag Laser ◽  
Laser System ◽  
Dental Enamel ◽  
Target Tissue ◽  
Structural Effects ◽  
Ablation Process ◽  
Dental Tissues ◽  
Laser Systems

ABSTRACT Ideally projected to be applied on soft tissues, infrared lasers were improved by restorative dentistry to be used in hard dental tissues cavity preparations — namely enamel and dentin. This paper evidentiates the relevant aspects of infrared Erbium laser's action mechanism and its effects, and characterizes the different effects deriving from the laser's beams emission. The criteria for use and selection of optimal parameters for the correct application of laser systems and influence of supporting factors on the process, such as water amount and its presence in the ablation process, protection exerted by the plasma shielding and structural factors, which are indispensable in dental tissues cavity preparation related to restorative technique, are subordinated to optical modifications caused by the interaction of the energy dissipated by these laser light emission systems in the targeted tissue substrate. Clinical relevance Differences in the action of infrared Erbium laser system in regard to the nature of the ablation process and variations on the morphological aspects observed in the superficial structure of the target tissue irradiated, may be correlated to the structural optical modifications of the substrate produced by an interaction of the energy propagated by laser systems. How to cite this article Lima DM, Tonetto MR, de Mendonça AAM, Elossais AA, Saad JRC, de Andrade MF, Pinto SCS, Bandéca MC. Human Dental Enamel and Dentin Structural Effects after Er:yag Laser Irradiation. J Contemp Dent Pract 2014;15(3):283-287.

Temperature Field of Repetitive Laser Pulse Irradiation and its Effect on Laser Surface Hardening

2011 ◽  
Vol 110-116 ◽  
pp. 823-830 ◽  
Author(s):  
Aniruddha Gupta ◽  
Ashish Kumar Nath
Keyword(s):  
Laser Pulse ◽  
Surface Hardening ◽  
Continuous Wave ◽  
High Carbon Steel ◽  
Laser Pulses ◽  
Phase Transformation Temperature ◽  
Continuous Wave Laser ◽  
Pulse Irradiation ◽  
Soaking Time ◽  
Analytical Expressions

Analytical expressions for the temperature rise in a semi-infinite workpiece due to the heating with CW and repetitive laser pulse irradiation have been derived. It has been shown that the soaking time at a temperature above the phase transformation temperature, on which the homogeneity of microstructure and the depth of hardening depend, can be increased by heating with repetitive laser pulses. Experimental results of surface hardening of high-carbon steel with repetitive laser pulses showed higher depth of hardening and better microstructure homogeneity compared to those with continuous wave laser.

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