scholarly journals Sapphire advanced mitigation process: wet etch to expose sub-surface damage and increase laser damage resistance and mechanical strength

2020 ◽  
Vol 59 (6) ◽  
pp. 1602
Author(s):  
T. Suratwala ◽  
R. Steele ◽  
J. Destino ◽  
L. Wong ◽  
M. Norton ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Surface Damage ◽  
Laser Damage ◽  
Damage Resistance ◽  
Wet Etch

Laser Damage Resistance of Photo-Thermo-Refractive Glass Bragg Gratings

2004 ◽  
Author(s):  
Leonid B. Glebov ◽  
Larissa N. Glebova ◽  
Vadim I. Smirnov ◽  
Mark Dubinskii ◽  
Larry D. Merkle ◽  
...  
Keyword(s):  
Bragg Gratings ◽  
Laser Damage ◽  
Damage Resistance

Laser damage resistance of ion-beam sputtered Sc2O3/SiO2 mixture optical coatings

2013 ◽  
Vol 52 (7) ◽  
pp. 1368 ◽  
Author(s):  
Mathias Mende ◽  
Stefan Schrameyer ◽  
Henrik Ehlers ◽  
Detlev Ristau ◽  
Laurent Gallais
Keyword(s):  
Ion Beam ◽  
Laser Damage ◽  
Optical Coatings ◽  
Damage Resistance

Optimization of laser-damage resistance of evaporated hafnia films at 351nm

2008 ◽  
Author(s):  
J. B. Oliver ◽  
S. Papernov ◽  
A. W. Schmid ◽  
J. C. Lambropoulos
Keyword(s):  
Laser Damage ◽  
Damage Resistance

scholarly journals Performance of rapid-grown KDP crystals with continuous filtration

2015 ◽  
Vol 3 ◽  
Author(s):  
Guohang Hu ◽  
Yueliang Wang ◽  
Junxiu Chang ◽  
Xiaoyi Xie ◽  
Yuanan Zhao ◽  
...  
Keyword(s):  
Near Infrared ◽  
Laser Damage ◽  
Damage Resistance ◽  
Damage Initiation ◽  
Micron Size ◽  
Continuous Filtration ◽  
Laser Induced Damage ◽  
Almost All ◽  
Lower Correlation ◽  
Kdp Crystals

Rapid growth processing of KDP crystals was improved by employing continuous filtration to eliminate bulk defects. The performances of the KDP crystals, including scattering defects, laser damage resistance and transmittance, were measured and analyzed. Compared with rapid-grown KDP without continuous filtration, the transmittance in the near-infrared was increased by at least 2%, almost all of ‘micron size’ defects were eliminated and ‘sub-micron size’ defects were decreased by approximately 90%. Laser damage testing revealed that the laser-induced damage thresholds (LIDTs), as well as the consistency of the LIDTs from sample to sample, were improved greatly. Moreover, it identified that ‘micron size’ defects were the precursors which initiated laser damage at relative lower laser fluence (4–6 J cm−2), and there was a lower correlation between smaller size scattering defects and laser damage initiation. The improved consistency in the LIDTs, attributed to elimination of ‘micron size’ defects, and LIDT enhancement originated from the decreased absorption of the KDP crystals.

Relation of optical properties and femtosecond laser damage resistance for Al2O3/AlF3 and Al2O3/SiO2 composite coatings

2014 ◽  
Vol 53 (4) ◽  
pp. A383 ◽  
Author(s):  
Mathias Mende ◽  
Istvan Balasa ◽  
Henrik Ehlers ◽  
Detlev Ristau ◽  
Dam-be Douti ◽  
...  
Keyword(s):  
Optical Properties ◽  
Femtosecond Laser ◽  
Composite Coatings ◽  
Laser Damage ◽  
Damage Resistance

scholarly journals Origin and effect of film sub-stoichiometry on ultraviolet, ns-laser damage resistance of hafnia single layers

2020 ◽  
Vol 10 (4) ◽  
pp. 937 ◽  
Author(s):  
Colin Harthcock ◽  
S. Roger Qiu ◽  
Paul B. Mirkarimi ◽  
Raluca A. Negres ◽  
Gabe Guss ◽  
...  
Keyword(s):  
Laser Damage ◽  
Damage Resistance

The effect of incident polarization handedness and ellipticity on the laser damage resistance of oriented liquid crystals in the nanosecond regime

2021 ◽  
Author(s):  
Kenneth L. Marshall ◽  
Kyle R. P. Kafka ◽  
Nathaniel D. Urban ◽  
Jason U. Wallace ◽  
Stavros G. Demos
Keyword(s):  
Liquid Crystals ◽  
Laser Damage ◽  
Damage Resistance ◽  
Incident Polarization

SURFACE DAMAGE BEHAVIOR OF GALVANIZED STEEL SHEETS IN FORMING PROCESS UNDER TENSION-BENDING

2010 ◽  
Vol 24 (30) ◽  
pp. 5877-5884 ◽  
Author(s):  
Z. Q. YU ◽  
Y. K. HOU ◽  
S. H. LI ◽  
Z. Q. LIN ◽  
W. G. ZHANG
Keyword(s):  
Sheet Metal Forming ◽  
Metal Forming ◽  
Surface Damage ◽  
Galvanized Steel ◽  
Forming Process ◽  
Damage Resistance ◽  
Steel Sheets ◽  
Galvanized Steels ◽  
Part Surface ◽  
Forming Tools

The surface damage behaviors of different galvanized steel sheets were investigated under the condition of tension-bending. The U-channel forming tests were performed for HDGI (hot-dip galvanized) and HDGA (hot-dip galvannealed) steels. Experimental results indicate that HDGI steel shows better damage resistance than HDGA steel in sheet metal forming. Scratching is the main surface damage in the forming of HDGI steel while exfoliating and scratching of coating are two types of surface damage for HDGA steel. And tool hardness and surface topography have crucial effects on part surface damage in the forming of the two kinds of galvanized steels. Different surface treatments should be applied to the forming tools in the forming of HDGI and HDGA steels for better surface qualities of products.

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