Implications of laser beam metrology on laser damage temporal scaling law for dielectric materials in the picosecond regime

2019 ◽  
Vol 90 (7) ◽  
pp. 073001 ◽  
Author(s):  
A. Ollé ◽  
J. Luce ◽  
N. Roquin ◽  
C. Rouyer ◽  
M. Sozet ◽  
...  
Keyword(s):  
Laser Beam ◽  
Scaling Law ◽  
Dielectric Materials ◽  
Laser Damage ◽  
Temporal Scaling

Advances in Ion and Laser Beam Technology: Achievements of Japanese Government and University Projects

1997 ◽  
Vol 504 ◽  
Author(s):  
Isao Yamada
Keyword(s):  
Laser Beam ◽  
Ion Beam ◽  
Dielectric Materials ◽  
Ion Beams ◽  
High Rate ◽  
Laser Beams ◽  
Research Association ◽  
Technology Research ◽  
Cluster Ion ◽  
Gas Cluster Ion Beam

ABSTRACTThis paper reviews recent R&D activity in advanced beam technologies funded by MITI and JST. A large-scale national project known as AMMTRA (Advanced Material-Processing and Machining Technology Research Association) funded by MITI has made a significant contribution to industrial applications of beam processing by developing high density ion and laser beam equipment. A subsequent program, the ACTA (Advanced Chemical Processing Technology Research Association) project involves development of multi-beam deposition systems for metal and dielectric materials formation including several systems which combine ion and laser beams, ion beams and CVD and plasma, and laser beams with sputtering. NEDO Proposal Based Project and JST (The Japan Science and Technology Corporation)-Exploitation and Application Study Project are fundamentally aimed to transfer technology from university to industry. Research in gas cluster ion beam technology is currently being conducted in the following areas: (i) shallow ion implantation for 0.1 μ m PMOS junction formation, (ii) high rate etching and smoothing for Si, diamond, SiC and metal oxide films and (iii) thin film depositions for optical filter and transparent conductive film. The gas cluster ion beam processes are discussed in comparison with traditional ion beam processing methods which are presently limited by available atomic and molecular ion beams.

Femtosecond to nanosecond laser damage in dielectric materials

2013 ◽  
Author(s):  
W. Rudolph ◽  
L. A. Emmert ◽  
C. Rodriguez ◽  
Z. Sun ◽  
X. Zhang ◽  
...  
Keyword(s):  
Dielectric Materials ◽  
Laser Damage ◽  
Nanosecond Laser

Mitigation of laser damage on fused silica surfaces with a variable profile CO 2 laser beam

2006 ◽  
Author(s):  
Annelise During ◽  
Philippe Bouchut ◽  
Jean-Guillaume Coutard ◽  
Christophe Leymarie ◽  
Hervé Bercegol
Keyword(s):  
Laser Beam ◽  
Fused Silica ◽  
Laser Damage ◽  
Silica Surfaces

Systematic Variation of Microstructure in Vapor-Deposited Ag Coatings on Cu Substrates: Studies of the Effect of Microstructure on Laser Damage Thresholds

1976 ◽  
Vol 34 ◽  
pp. 632-633
Author(s):  
W.A. Szilva ◽  
L.E. Murr
Keyword(s):  
Short Pulse ◽  
Damage Threshold ◽  
Dielectric Materials ◽  
Structural Features ◽  
Crystal Defects ◽  
Laser Damage ◽  
Systematic Evaluation ◽  
Short Pulse Laser ◽  
Cu Substrates ◽  
Coating Microstructure

The attainment of high power density lasers is, in many respects, limited by the properties of windows and mirrors; and is therefore materials limited. Aside from microcracks, voids, and other structural features contributing to laser-induced degradation, there has been some indication that other microstructural phenomena such as the presence of crystal defects might also contribute. While the subject of short-pulse laser damage at the surfaces of both coated and uncoated dielectric materials has received considerable attention in recent years, little attention has been paid to the systematic evaluation of mirror surface and surface coating microstructure on laserinduced damage (or damage threshold). Although some preliminary work has been done on determining the relationship between the optical properties of metal films and departures from crystalline perfection of the films, no efforts have been made to determine the effects of metal coating microstructure on laser damage thresholds.

Temporal scaling law and intrinsic characteristic of laser induced damage on the dielectric coating

2018 ◽  
Vol 428 ◽  
pp. 322-327
Author(s):  
Li Zhou ◽  
Youen Jiang ◽  
Chao Wang ◽  
Hui Wei ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Scaling Law ◽  
Dielectric Coating ◽  
Temporal Scaling ◽  
Laser Induced Damage ◽  
Intrinsic Characteristic

FRACTALITY OF RAINFALL: IDENTIFICATION OF TEMPORAL SCALING LAW

Fractals ◽  
1999 ◽  
Vol 07 (02) ◽  
pp. 123-131 ◽  
Author(s):  
SHU-CHEN LIN ◽  
CHANG-LING LIU ◽  
TZONG-YEANG LEE
Keyword(s):  
Probability Density Function ◽  
Scale Invariance ◽  
Scaling Law ◽  
Analysis Method ◽  
Probability Scale ◽  
Scale Invariant ◽  
Temporal Scaling ◽  
Calculation Of Parameters ◽  
Hydrologic Variable ◽  
Different Levels

This paper introduces the concept of point-fractal to analyze the time-scale variability of rainfall data on the northern and southern regions of Taiwan. It is evident that scale invariance exists in time and clustering will decrease in accord with the increase of threshold. Under the variation of threshold, it can be verified that the maximum values of the homogenous scale-invariant interval are just the same. In addition, taking the probability-scale law on different levels of threshold, the relation can be established between the saturation scale (return period) and the threshold (design hydrologic variable). The methodology is different from the traditional one, i.e. frequency analysis method. When both methods are compared, it is found that the former does not require either the probability density function or the calculation of parameters. We conclude that this study provides a new alternative method in computation.

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