SPIE Laser Damage最新文献_第3页

Light scattering from laser-induced shallow pits on silica exit surfaces 激光诱导的二氧化硅出口表面浅凹坑的光散射

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2195504

E. Feigenbaum, R. Raman, N. Nielsen, M. Matthews

引用次数: 1

Scaling of laser-induced contamination growth at 266nm and 355nm 266nm和355nm激光诱导污染生长的标度

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2194083

M. Liessmann, L. Jensen, I. Balasa, M. Hunnekuhl, A. Büttner, P. Wessels, J. Neumann, D. Ristau

引用次数: 7

Laser damage resistance of optical components in sub-picosecond regime in the infrared 红外亚皮秒区光学元件的抗激光损伤性能

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2194286

M. Sozet, J. Néauport, E. Lavastre, N. Roquin, L. Gallais, L. Lamaignère

引用次数: 0

Analysis of cumulative versus ISO-recommended calculation of damage probability using a database of real S-on-1 tests 使用实际S-on-1试验数据库对累积与iso推荐的损伤概率计算进行分析

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2194303

A. Zorila, A. Stratan, I. Dumitrache, L. Rusen, G. Nemeş

引用次数: 2

Improved parametric spectroscopic performance of an optical fiber doped with erbium 掺铒光纤参数光谱性能的改进

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2194077

M. Ghoumazi, N. Demagh, A. Adouane, B. Boubir, A. Daoui

引用次数: 0

Calculation of nonlinear optical damage from space-time-tailored pulses in dielectrics 介质中时空定制脉冲非线性光学损伤的计算

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2195299

T. Lanier, J. Gulley

{"title":"Calculation of nonlinear optical damage from space-time-tailored pulses in dielectrics","authors":"T. Lanier, J. Gulley","doi":"10.1117/12.2195299","DOIUrl":"https://doi.org/10.1117/12.2195299","url":null,"abstract":"Control of the time duration of a laser pulse as it focuses spatially in a material provides a means for delaying the onset of nonlinear effects during propagation. We investigate simultaneous space-time focusing (SSTF) of femtosecond radially-chirped annular pulses in Kerr dielectrics. The energy and temporal chirp of pulses incident upon a grating-grating-lens system are varied in simulations that solve the unidirectional pulse propagation equation. This system is modeled by inserting transformations that act on the electric field obtained from propagation from one component to the next. The propagation is coupled to the time evolution of the free charge density as a function of space. The resulting “ionization tracks” are taken as a metric for predicting material modification and/or damage in bulk fused silica. As expected from linear-optical considerations, the temporal pre-chirp determines the overall pulse duration as the focusing annulus closes. We find in addition that, for a given pulse energy, the temporal pre-chirp also determines the on-axis intensity distribution as energy collapses onto the propagation axis. This effect determines how the local ionization-induced decrease in refractive index shifts energy in time relative to energy arriving on-axis from the spatially collapsing beam. The magnitude of the pre-chirp can thus control the spatial structure of ionization that may lead to material modification and/or damage.","PeriodicalId":204978,"journal":{"name":"SPIE Laser Damage","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131714165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Measurement and compensation of wavefront deformations and focal shifts in high-power laser optics 高功率激光光学中波前变形和焦移的测量与补偿

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2196160

Klaus Mann, B. Schäfer, M. Stubenvoll, K. Hentschel, M. Zenz

引用次数: 3

Analysis of energy deposition and damage mechanisms in single layers of HfO2 and Nb2O5 submitted to 500fs pulses 500fs脉冲下HfO2和Nb2O5单层能量沉积及损伤机理分析

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2195005

Dam-be Douti, M. Chrayteh, S. Monneret, M. Commandré, L. Gallais

引用次数: 0

Energetic laser cleaning of metallic particles and surface damage on silica optics: investigation of the underlying mechanisms 金属颗粒的高能激光清洗和二氧化硅光学表面损伤:潜在机制的研究

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2195593

N. Shen, S. Demos, R. Negres, A. Rubenchik, C. Harris, M. Matthews

{"title":"Energetic laser cleaning of metallic particles and surface damage on silica optics: investigation of the underlying mechanisms","authors":"N. Shen, S. Demos, R. Negres, A. Rubenchik, C. Harris, M. Matthews","doi":"10.1117/12.2195593","DOIUrl":"https://doi.org/10.1117/12.2195593","url":null,"abstract":"Surface particulate contamination on optics can lead to laser-induced damage hence limit the performance of high power laser system. In this work we focus on understanding the fundamental mechanisms that lead to damage initiation by metal contaminants. Using time resolved microscopy and plasma spectroscopy, we studied the dynamic process of ejecting ~30 μm stainless steel particles from the exit surface of fused silica substrate irradiated with 1064 nm, 10 ns and 355 nm, 8 ns laser pulses. Time-resolved plasma emission spectroscopy was used to characterize the energy coupling and temperature rise associated with single, 10-ns pulsed laser ablation of metallic particles bound to transparent substrates. Plasma associated with Fe(I) emission lines originating from steel microspheres was observe to cool from <24,000 K to ~15,000 K over ~220 ns as τ-0.22, consistent with radiative losses and adiabatic gas expansion of a relatively free plasma. Simultaneous emission lines from Si(II) associated with the plasma etching of the SiO2 substrate were observed yielding higher plasma temperatures, ~35,000 K, relative to the Fe(I) plasma. The difference in species temperatures is consistent with plasma confinement at the microsphere-substrate interface as the particle is ejected, and is directly visualized using pump-probe shadowgraphy as a function of pulsed laser energy.","PeriodicalId":204978,"journal":{"name":"SPIE Laser Damage","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126408093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Direct absorption measurements in thin rods and optical fibers 细棒和光纤的直接吸收测量

SPIE Laser Damage Pub Date : 2015-11-23 DOI: 10.1117/12.2192579

C. Mühlig, S. Bublitz, M. Lorenz

引用次数: 0