2 12 D Electromagnetic Modeling Of Nodular Defects In High Power Multilayer Optical Coatings

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2−12-D Electromagnetic Modeling of Nodular Defects in High-power Multilayer Optical Coatings

Author :
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (893 download)

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Book Synopsis 2−12-D Electromagnetic Modeling of Nodular Defects in High-power Multilayer Optical Coatings by :

Download or read book 2−12-D Electromagnetic Modeling of Nodular Defects in High-power Multilayer Optical Coatings written by and published by . This book was released on 1996 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in the design and production of high damage threshold optical coatings for use in mirrors and polarizers have been driven by the design requirements of high-power laser systems such as the proposed 1.8-MJ National Ignition Facility (NIF) and the prototype 12- kJ Beamlet laser system. The present design of the NIF will include 192 polarizers and more than 1100 mirrors. Currently, the material system of choice for high-power multilayer optical coatings with high damage threshold applications near 1.06 [mu]m are e-beam deposited HfO2/Si02 coatings. However, the optical performance and laser damage thresholds of these coatings are limited by micron-scale defects and insufficient control over layer thickness. In this report, we will discuss the results of our 2-1/2-D finite-element time- domain (FDTD) EM modeling effort for rotationally-symmetric nodular defects in multilayer dielectric HR coatings. We have added a new diagnostic to the 2-1/2-D FDTD EM code, AMOS, that enables us to calculate the peak steady-state electric fields throughout a 2-D planar region containing a 2-D r-z cross-section of the axisymmetric nodular defect and surrounding multilayer dielectric stack. We have also generated a series of design curves to identify the range of loss tangents for Si02 and HfO2 consistent with the experimentally determined power loss of the HR coatings. In addition, we have developed several methods to provide coupling between the EM results and the thermal-mechanical simulation effort.

2-1/2-D Electromagnetic Modeling of Nodular Defects in High-power Multilayer Optical Coatings

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis 2-1/2-D Electromagnetic Modeling of Nodular Defects in High-power Multilayer Optical Coatings by :

Download or read book 2-1/2-D Electromagnetic Modeling of Nodular Defects in High-power Multilayer Optical Coatings written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in the design and production of high damage threshold optical coatings for use in mirrors and polarizers have been driven by the design requirements of high-power laser systems such as the proposed 1.8-MJ National Ignition Facility (NIF) and the prototype 12- kJ Beamlet laser system. The present design of the NIF will include 192 polarizers and more than 1100 mirrors. Currently, the material system of choice for high-power multilayer optical coatings with high damage threshold applications near 1.06[mu]m are e-beam deposited HfO[sub 2]/Si0[sub 2] coatings. However, the optical performance and laser damage thresholds of these coatings are limited by micron-scale defects and insufficient control over layer thickness. In this report, we will discuss the results of our 2-1/2-D finite-element time- domain (FDTD) EM modeling effort for rotationally-symmetric nodular defects in multilayer dielectric HR coatings. We have added a new diagnostic to the 2-1/2-D FDTD EM code, AMOS, that enables us to calculate the peak steady-state electric fields throughout a 2-D planar region containing a 2-D r-z cross-section of the axisymmetric nodular defect and surrounding multilayer dielectric stack. We have also generated a series of design curves to identify the range of loss tangents for Si0[sub 2] and HfO[sub 2] consistent with the experimentally determined power loss of the HR coatings. In addition, we have developed several methods to provide coupling between the EM results and the thermal-mechanical simulation effort.

Energy Research Abstracts

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Publisher :
ISBN 13 :
Total Pages : 762 pages
Book Rating : 4.:/5 (3 download)

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Book Synopsis Energy Research Abstracts by :

Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.

Scientific and Technical Aerospace Reports

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Publisher :
ISBN 13 :
Total Pages : 692 pages
Book Rating : 4.:/5 (3 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Characterization of Defect Geometries in Multilayer Optical Coatings

Author :
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (685 download)

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Book Synopsis Characterization of Defect Geometries in Multilayer Optical Coatings by :

Download or read book Characterization of Defect Geometries in Multilayer Optical Coatings written by and published by . This book was released on 1993 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-induced damage in optical coatings is generally associated with micrometer-scale defects. A simple geometric model for nodule-shaped defects is commonly used to describe defects in optical coatings. No systematic study has been done, however, to prove the applicability of that model to standard optical coating deposition. Some defects are known not to have a classic nodule geometry. The present study uses atomic force microscopy (AFM) and scanning electron microscopy to characterize the topography of coating defects in a HfO2/SiO2 multilayer mirror system. Focused ion-beam cross-sectioning is then used to study the underlying defect structure. This work develops a model for defect shape such that the overall geometry of a coating defect, particularly seed size and depth, can be inferred from non-destructive evaluation measurements such as AFM. The relative mechanical stabilities of nodular defects can be deduced based on the nodule's geometry. Auger analysis showed that the seed material that causes nodular defects in HfO2/SiO2 multilayers is a hafnia oxide. Such characterization capabilities are needed for understanding the enhanced susceptibility of particular defects to laser damage and for developing improved techniques for depositing low-defect density coatings.

Electric-Field Enhancement by Nodular Defects in Multilayer Coatings Irradiated at Normal and 45 (degree) Incidence

Author : C. J. Stolz
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)

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Book Synopsis Electric-Field Enhancement by Nodular Defects in Multilayer Coatings Irradiated at Normal and 45 (degree) Incidence by : C. J. Stolz

Download or read book Electric-Field Enhancement by Nodular Defects in Multilayer Coatings Irradiated at Normal and 45 (degree) Incidence written by C. J. Stolz and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The standing-wave electric-field profile within multilayer coatings is significantly perturbated by a nodular defect. The intensity, which is proportional to the electric field squared, is increased in the high index material by {>=}3x at normal incidence and {>=}12x at 45 degrees incidence angle. Therefore it is not surprising that nodular defects are initiation sites of laser-induced damage. In this study, the impact of reflectance-band centering and incident angle are explored for a 1 {micro}m diameter nodular defect seed overcoated with a 24 layer high-reflector constructed of quarter-wave thick alternating layers of hafnia and silica. The modeling was performed using a three-dimensional finite-element analysis code.

International Symposium on Gas Flow and Chemical Lasers, ...

Author :
Publisher :
ISBN 13 :
Total Pages : 868 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis International Symposium on Gas Flow and Chemical Lasers, ... by :

Download or read book International Symposium on Gas Flow and Chemical Lasers, ... written by and published by . This book was released on 1998 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Formation and Development of Nodular Defects in Optical Coatings

Author : B. Liao
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis The Formation and Development of Nodular Defects in Optical Coatings by : B. Liao

Download or read book The Formation and Development of Nodular Defects in Optical Coatings written by B. Liao and published by . This book was released on 1988 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have investigated the nodular defect using computer simulations and experimental techniques. A modified version of the hard-disk model, in which the migration and attraction of atoms are introduced in simplified ways, is used to simulate the formation and development of nodules. This simulation reveals the self-extending nature of nodule growth and the dependence of the nodule shape and size upon the conditions of the coating's formation, including deposition geometry, migration, and capture length of atoms. By planting artificial seeds on substrate surfaces and overcoating with single and multilayer stacks, we have encourged nodular formation under controlled and variable deposition conditions. Fractured cross-sections of these coatings have been examined by scanning microscopy (SEM). A comparison between our experimental observations and the modeling results help explain the mechanisms for nodule growth.

Government Reports Announcements & Index

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ISBN 13 :
Total Pages : 1506 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Government Reports Announcements & Index by :

Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1993-08 with total page 1506 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Laser-induced Damage in Optical Materials, 1993

Author : Harold Earl Bennett
Publisher :
ISBN 13 : 9780819414076
Total Pages : 762 pages
Book Rating : 4.4/5 (14 download)

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Book Synopsis Laser-induced Damage in Optical Materials, 1993 by : Harold Earl Bennett

Download or read book Laser-induced Damage in Optical Materials, 1993 written by Harold Earl Bennett and published by . This book was released on 1994 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ceramic Coatings

Author : Feng Shi
Publisher : BoD – Books on Demand
ISBN 13 : 9535100831
Total Pages : 300 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Ceramic Coatings by : Feng Shi

Download or read book Ceramic Coatings written by Feng Shi and published by BoD – Books on Demand. This book was released on 2012-02-24 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main target of this book is to state the latest advancement in ceramic coatings technology in various industrial fields. The book includes topics related to the applications of ceramic coating covers in enginnering, including fabrication route (electrophoretic deposition and physical deposition) and applications in turbine parts, internal combustion engine, pigment, foundry, etc.

Vacuum Deposition onto Webs, Films and Foils

Author : Charles Bishop
Publisher : William Andrew
ISBN 13 : 0323296904
Total Pages : 603 pages
Book Rating : 4.3/5 (232 download)

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Book Synopsis Vacuum Deposition onto Webs, Films and Foils by : Charles Bishop

Download or read book Vacuum Deposition onto Webs, Films and Foils written by Charles Bishop and published by William Andrew. This book was released on 2015-08-15 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vacuum Deposition onto Webs: Films and Foils, Third Edition, provides the latest information on vacuum deposition, the technology that applies an even coating to a flexible material that can be held on a roll, thereby offering a much faster and cheaper method of bulk coating than deposition onto single pieces or non-flexible surfaces such as glass. This technology has been used in industrial-scale applications for some time, including a wide range of metalized packaging. Its potential as a high-speed, scalable process has seen an increasing range of new products emerging that employ this cost-effective technology, including solar energy products that are moving from rigid panels onto cheaper and more versatile flexible substrates, flexible electronic circuit ‘boards’, and flexible displays. In this third edition, all chapters are thoroughly revised with a significant amount of new information added, including newly developed barrier measurement techniques, improved in-vacuum monitoring technologies, and the latest developments in Atomic Layer Deposition (ALD). Provides the know-how to maximize productivity of vacuum coating systems Thoroughly revised with a significant amount of new information added, including newly developed barrier measurement techniques, improved in-vacuum monitoring technologies, and the latest on Atomic Layer Deposition (ALD) Presents the latest information on vacuum deposition, the technology that applies an even coating to a flexible material that can be held on a roll, thereby offering a much faster and cheaper method of bulk coating Enables engineers to specify systems more effectively and enhances dialogue between non-specialists and suppliers/engineers Empowers those in rapidly expanding fields such as solar energy, display panels, and flexible electronics to unlock the potential of vacuum coating to transform their processes and products

Coatings Technology Handbook

Author : Arthur A. Tracton
Publisher : CRC Press
ISBN 13 : 1420027328
Total Pages : 930 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Coatings Technology Handbook by : Arthur A. Tracton

Download or read book Coatings Technology Handbook written by Arthur A. Tracton and published by CRC Press. This book was released on 2005-07-28 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: Serving as an all-in-one guide to the entire field of coatings technology, this encyclopedic reference covers a diverse range of topics-including basic concepts, coating types, materials, processes, testing and applications-summarizing both the latest developments and standard coatings methods. Take advantage of the insights and experience of over

Laser Material Processing

Author : William M. Steen
Publisher : Springer Science & Business Media
ISBN 13 : 1447137523
Total Pages : 416 pages
Book Rating : 4.4/5 (471 download)

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Book Synopsis Laser Material Processing by : William M. Steen

Download or read book Laser Material Processing written by William M. Steen and published by Springer Science & Business Media. This book was released on 2013-04-18 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: New chapters on bending and cleaning reflect the changes in the field since the last edition, completing the range of practical knowledge about the processes possible with lasers already familiar to users of this well-known text. Professor Steen's lively presentation is supported by a number of original cartoons by Patrick Wright and Noel Ford, which will bring a smile to your face and ease the learning process. From the reviews: "...well organized, and the text is very practical...The engineering community will find this book informative and useful." (OPTICS AND PHOTONICS NEWS, July/August 2005)

Carbon Black

Author : Jean-Baptiste Donnet
Publisher : Routledge
ISBN 13 : 135146261X
Total Pages : 484 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Carbon Black by : Jean-Baptiste Donnet

Download or read book Carbon Black written by Jean-Baptiste Donnet and published by Routledge. This book was released on 2018-05-04 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this reference provides comprehensive examinations of developments in the processing and applications of carbon black, including the use of new analytical tools such as scanning tunnelling microscopy, Fourier transform infrared spectroscopy and inverse gas chromatography.;Completely rewritten and updated by numerous experts in the field to reflect the enormous growth of the field since the publication of the previous edition, Carbon Black: discusses the mechanism of carbon black formation based on recent advances such as the discovery of fullerenes; elucidates micro- and macrostructure morphology and other physical characteristics; outlines the fractal geometry of carbon black as a new approach to characterization; reviews the effect of carbon black on the electrical and thermal conductivity of filled polymers; delineates the applications of carbon black in elastomers, plastics, and zerographic toners; and surveys possible health consequences of exposure to carbon black.;With over 1200 literature citations, tables, and figures, this resource is intended for physical, polymer, surface and colloid chemists; chemical and plastics engineers; spectroscopists; materials scientists; occupational safety and health physicians; and upper-level undergraduate and graduate students in these disciplines.

Laser-Induced Damage in Optical Materials

Author : Detlev Ristau
Publisher : CRC Press
ISBN 13 : 1439872171
Total Pages : 544 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Laser-Induced Damage in Optical Materials by : Detlev Ristau

Download or read book Laser-Induced Damage in Optical Materials written by Detlev Ristau and published by CRC Press. This book was released on 2014-12-03 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dedicated to users and developers of high-powered systems, Laser-Induced Damage in Optical Materials focuses on the research field of laser-induced damage and explores the significant and steady growth of applications for high-power lasers in the academic, industrial, and military arenas. Written by renowned experts in the field, this book concentr

Handbook of Solid-State Lasers

Author : B Denker
Publisher : Elsevier
ISBN 13 : 0857097504
Total Pages : 688 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis Handbook of Solid-State Lasers by : B Denker

Download or read book Handbook of Solid-State Lasers written by B Denker and published by Elsevier. This book was released on 2013-02-20 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid-state lasers which offer multiple desirable qualities, including enhanced reliability, robustness, efficiency and wavelength diversity, are absolutely indispensable for many applications. The Handbook of solid-state lasers reviews the key materials, processes and applications of solid-state lasers across a wide range of fields.Part one begins by reviewing solid-state laser materials. Fluoride laser crystals, oxide laser ceramics, crystals and fluoride laser ceramics doped by rare earth and transition metal ions are discussed alongside neodymium, erbium and ytterbium laser glasses, and nonlinear crystals for solid-state lasers. Part two then goes on to explore solid-state laser systems and their applications, beginning with a discussion of the principles, powering and operation regimes for solid-state lasers. The use of neodymium-doped materials is considered, followed by system sizing issues with diode-pumped quasi-three level materials, erbium glass lasers, and microchip, fiber, Raman and cryogenic lasers. Laser mid-infrared systems, laser induced breakdown spectroscope and the clinical applications of surgical solid-state lasers are also explored. The use of solid-state lasers in defense programs is then reviewed, before the book concludes by presenting some environmental applications of solid-state lasers.With its distinguished editors and international team of expert contributors, the Handbook of solid-state lasers is an authoritative guide for all those involved in the design and application of this technology, including laser and materials scientists and engineers, medical and military professionals, environmental researchers, and academics working in this field. Reviews the materials used in solid-state lasers Explores the principles of solid-state laser systems and their applications Considers defence and environmental applications