scholarly journals Improvement of laser damage resistance and diffraction efficiency of multilayer dielectric diffraction gratings by HF etchback linewidth tailoring

2010 ◽  
Author(s):  
Hoang T. Nguyen ◽  
Cindy C. Larson ◽  
Jerald A. Britten
Keyword(s):  
Diffraction Efficiency ◽  
Diffraction Gratings ◽  
Laser Damage ◽  
Damage Resistance ◽  
Multilayer Dielectric

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

Improving the performance of high-laser-damage-threshold, multilayer dielectric pulse-compression gratings through low-temperature chemical cleaning

2013 ◽  
Vol 52 (8) ◽  
pp. 1682 ◽  
Author(s):  
Heather P. Howard ◽  
Anthony F. Aiello ◽  
Justin G. Dressler ◽  
Nicholas R. Edwards ◽  
Terrance J. Kessler ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pulse Compression ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Laser Damage ◽  
Chemical Cleaning ◽  
High Laser ◽  
Multilayer Dielectric

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 Synthesis of highly efficient multilayer dielectric diffraction gratings for spectral combining of laser beams

2021 ◽  
pp. 200-209
Author(s):  
А.А. Петухов
Keyword(s):  
High Efficiency ◽  
Diffraction Order ◽  
Diffraction Gratings ◽  
Merit Function ◽  
Synthesis Problem ◽  
Laser Beams ◽  
Etch Depth ◽  
Technological Constraints ◽  
Scattering Matrix Method ◽  
Multilayer Dielectric

Статья посвящена синтезу многослойных диэлектрических отражательных дифракционных решеток, с высокой эффективностью обеспечивающих спектральное сложение пучков с различной длиной волны в заданном дифракционном порядке. Приводятся результаты решения задачи синтеза многослойных диэлектрических дифракционных решеток, обеспечивающих спектральное сложение в первом или минус первом порядке дифракции. Кроме того, решается задача синтеза для таких решеток с учетом возможных технологических ограничений на высоту профиля (глубину травления). Решение задачи синтеза проводится путем минимизации зависящего от параметров решетки целевого функционала методом Нелдера-Мида. Решение прямой задачи на каждом шаге минимизации осуществляется при помощи комбинации неполного метода Галеркина и метода матриц рассеяния. The paper is devoted to the synthesis of multilayer dielectric reflection diffraction gratings providing high-efficiency spectral combining of the beams with different wavelengths in a given diffraction order. The results are presented for solving the synthesis problems for multilayer dielectric diffraction gratings providing spectral combining in the first or minus first diffraction order. Besides, the synthesis problem for such gratings is solved with account taken of possible technological constraints imposed by the height of the grating profile (etch depth). The solution of the synthesis problem is obtained by means of Nelder-Mead minimization of the merit function depending on the grating parameters. At each minimization step the direct problem is solved using a combination of the incomplete Galerkin method and scattering matrix method.

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
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