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Correlation Of Polishing Induced Shallow Subsurface Damages With Laser Induced Gray Haze Damages In Fused Silica Optics
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Book Synopsis Correlation of Polishing-induced Shallow Subsurface Damages with Laser-induced Gray Haze Damages in Fused Silica Optics by :
Download or read book Correlation of Polishing-induced Shallow Subsurface Damages with Laser-induced Gray Haze Damages in Fused Silica Optics written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Laser-induced damage in fused silica optics greatly restricts the performances of laser facilities. Gray haze damage, which is always initiated on ceria polished optics, is one of the most important damage morphologies in fused silica optics. In this paper, the laser-induced gray haze damages of four fused silica samples polished with CeO2, Al2 O3, ZrO2, and colloidal silica slurries are investigated. Four samples all present gray haze damages with much different damage densities. Then, the polishing-induced contaminant and subsurface damages in four samples are analyzed. The results reveal that the gray haze damages could be initiated on the samples without Ce contaminant and are inclined to show a tight correlation with the shallow subsurface damages.
Book Synopsis Subsurface Defect Characterization and Laser-induced Damage Performance of Fused Silica Optics Polished with Colloidal Silica and Ceria by :
Download or read book Subsurface Defect Characterization and Laser-induced Damage Performance of Fused Silica Optics Polished with Colloidal Silica and Ceria written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: This paper mainly focuses on the influence of colloidal silica polishing on the damage performance of fused silica optics. In this paper, nanometer sized colloidal silica and micron sized ceria are used to polish fused silica optics. The colloidal silica polished samples and ceria polished samples exhibit that the root-mean-squared (RMS) average surface roughness values are 0.7 nm and 1.0 nm, respectively. The subsurface defects and damage performance of the polished optics are analyzed and discussed. It is revealed that colloidal silica polishing will introduce much fewer absorptive contaminant elements and subsurface damages especially no trailing indentation fracture. The 355-nm laser damage test reveals that each of the fused silica samples polished with colloidal silica has a much higher damage threshold and lower damage density than ceria polished samples. Colloidal silica polishing is potential in manufacturing high power laser optics.
Book Synopsis Schetsen, bevattende ziel-, mensch-, opvoed- en onderwijskundige grondtrekken by :
Download or read book Schetsen, bevattende ziel-, mensch-, opvoed- en onderwijskundige grondtrekken written by and published by . This book was released on 1820 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damage in Optical Materials by :
Download or read book Laser Induced Damage in Optical Materials written by and published by . This book was released on 1972 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damage in Optical Materials by :
Download or read book Laser Induced Damage in Optical Materials written by and published by . This book was released on 1977 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Correlation of Laser-Induced Damage to Phase Objects in Bulk Fused Silica by : M. A. Johnson
Download or read book Correlation of Laser-Induced Damage to Phase Objects in Bulk Fused Silica written by M. A. Johnson and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Optical Sciences Laser (OSL) Upgrade facility, described in last year's proceedings, is a kJ-class, large aperture (100cm{sup 2}) laser system that can accommodate prototype optical components for large-scale inertial confinement fusion lasers. High-energy operation of such lasers is often limited by damage to the optical components. Recent experiments on the OSL Upgrade facility using fused silica components at 4 J/cm{sup 2} (351-nm, 3-ns) have created output surface and bulk damage sites that have been correlated to phase objects in the bulk of the material. Optical Path Difference (OPD) measurements of the phase defects indicate the probability of laser-induced damage is strongly dependent on OPD.
Book Synopsis The Effect of Subsurface Defects on "Incipient" (Below Threshold) Laser Damage Nucleation in Fused Silica Optical Flats by : JD. Boyer
Download or read book The Effect of Subsurface Defects on "Incipient" (Below Threshold) Laser Damage Nucleation in Fused Silica Optical Flats written by JD. Boyer and published by . This book was released on 1990 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of subsurface defects in optical components has been extensively investigated by the authors and others over the past few years. Investigation of optical components using nondestructive photon backscattering (PBSTM), delineation etch/optical microscopy and charge decoration/delineation techniques has shown laterally variable spatial distributions of subsurface defects in the form of lineated remnant polishing traces, voids, and microscopic impurity clusters introduced during the surface finishing process. In this paper, we report on the correlation between nondestructive PBSTM mapping and delineation etch/optical microscopy techniques for detection of subsurface defects, as well as the effect of subsurface defects on the initiation of microscopic or "incipient" laser damage (?= 248 nm) at levels below the point of macroscopic or catastrophic failure observed at the surface. The detection of laser induced microscopic cracking on nucleation sites within nondestructively identified areas provides additional insight into the progressive development of failure sites in distributed subsurface regions of low RMS, optically finished surfaces.
Book Synopsis Laser Induced Damage in Optical Materials by : Brian E. Newnam
Download or read book Laser Induced Damage in Optical Materials written by Brian E. Newnam and published by ASTM International. This book was released on 1986 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damages in Optical Materials: 1983 by :
Download or read book Laser Induced Damages in Optical Materials: 1983 written by and published by ASTM International. This book was released on with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damage in Optical Materials: by : Arthur H. Guenther
Download or read book Laser Induced Damage in Optical Materials: written by Arthur H. Guenther and published by ASTM International. This book was released on 1977 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of the Effects of Polishing, Etching, Cleaving, and Water Leaching on the UV Laser Damage of Fused Silica by :
Download or read book Study of the Effects of Polishing, Etching, Cleaving, and Water Leaching on the UV Laser Damage of Fused Silica written by and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A damage morphology study was performed with a 355 nm Nd:YAG laser on synthetic UV-grade fused silica to determine the effects of post- polish chemical etching on laser-induced damage, compare damage morphologies of cleaved and polished surfaces, and understand the effects of the hydrolyzed surface layer and waste-crack interactions. The samples were polished, then chemically etched in buffered HF solution to remove 45,90,135, and 180 nm of surface material. Another set of samples was cleaved and soaked in boiling distilled water for 1 second and 1 hour. All the samples were irradiated at damaging fluencies and characterized by Normarski optical microscopy and scanning electron microscopy. Damage was initiated as micro-pits on both input and output surfaces of the polished fused silica sample. At higher fluencies, the micro-pits generated cracks on the surface. Laser damage of the polished surface showed significant trace contamination levels within a 50 nm surface layer. Micro-pit formation also appeared after irradiating cleaved fused silica surfaces at damaging fluences. Linear damage tracks corresponding cleaving tracks were often observed on cleaved surfaces. Soaking cleaved samples in water produced wide laser damage tracks.
Book Synopsis Subsurface Polishing Damage of Fused Silica by : NJ. Brown
Download or read book Subsurface Polishing Damage of Fused Silica written by NJ. Brown and published by . This book was released on 1991 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nature of subsurface damage incurred during polishing of fused silica varies greatly with the polishing process. Although subsurface damage is known to lower laser damage thresholds for fused silica surfaces1,2, the effect on thresholds of coated dielectric surfaces has not been previously documented. This study describes features of subsurface damage due to polishing by ten commercial fabricators and compares laser damage thresholds of a high reflection coating on these surfaces.
Book Synopsis Laser-induced Damage Initiated on the Surface of Particle Contaminated Fused Silica Optics at 1064nm by : Kenneth Jerome Francis Michlitsch
Download or read book Laser-induced Damage Initiated on the Surface of Particle Contaminated Fused Silica Optics at 1064nm written by Kenneth Jerome Francis Michlitsch and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damage in Optical Materials, 1986 by : Harold Earl Bennett
Download or read book Laser Induced Damage in Optical Materials, 1986 written by Harold Earl Bennett and published by . This book was released on 1988 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damage in Optical Materials: 1983 by : Harold Earl Bennett
Download or read book Laser Induced Damage in Optical Materials: 1983 written by Harold Earl Bennett and published by ASTM International. This book was released on 1985 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser-induced Damage in Optical Materials, 1990 by : Harold Earl Bennett
Download or read book Laser-induced Damage in Optical Materials, 1990 written by Harold Earl Bennett and published by ASTM International. This book was released on 1991 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of meeting -- Materials and measurements -- Surfaces and mirrors -- Thin films -- Fundamental mechanisms -- Presented by title only (papers not presented at conference).
Book Synopsis Growth of Laser Initiated Damage in Fused Silica at 527 Nm by : J. N. McElroy
Download or read book Growth of Laser Initiated Damage in Fused Silica at 527 Nm written by J. N. McElroy and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effective lifetime of optics is limited by both laser-induced damage and the subsequent growth of laser initiated damage sites. We have measured the growth rate of laser-induced damage in fused silica in both air and vacuum at 527 nm. For damage on the exit surface, the data shows exponential growth in the lateral size of the damage site with shot number. The exponential growth coefficient depends linearly on the laser fluence. The behavior at the fluence threshold for growth is contrasted to that observed at 351 nm. The growth rate was not significantly affected by either the wavelength of the initiating fluence or the presence of 10 torr of air as compared to vacuum. When the damage is located on the input surface, it has both a higher threshold for growth and does not grow exponentially.
