Laser Damage最新文献_第2页

Influence of laser beam size on the determination of LIDT 激光光束大小对测定 LIDT 的影响

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2686177

M. Mureșan, J. Vanda, Saulius Pakalnis, Martin Mydlář, J. Brajer

引用次数: 0

Temporally and spatially resolved photoluminescence of laser-induced damage sites of fused silica 激光诱导熔融石英损伤点的时间和空间分辨光致发光

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2683719

Jae Hyuck Yoo, Yoonsoo Rho, Christopher F. Miller, Robin E. Yancey, Ted A. Laurence, C. W. Carr

引用次数: 0

Study of high-performance IBS coatings for near-IR laser applications 用于近红外激光应用的高性能 IBS 涂层研究

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2685243

Alex Ribeaud, Jürgen Pistner, Mathias Soulier, Julien Lumeau, Laurent Gallais, Rico Benz, Christoph Sturzenegger, B. Eiermann, Christian Mühlig, Thomas Gischkat, Sven Schröder

{"title":"Study of high-performance IBS coatings for near-IR laser applications","authors":"Alex Ribeaud, Jürgen Pistner, Mathias Soulier, Julien Lumeau, Laurent Gallais, Rico Benz, Christoph Sturzenegger, B. Eiermann, Christian Mühlig, Thomas Gischkat, Sven Schröder","doi":"10.1117/12.2685243","DOIUrl":"https://doi.org/10.1117/12.2685243","url":null,"abstract":"In many laser applications, there is a higher and higher demand for more efficient coatings with reduced losses, in terms of absorption and scattering as those are contributing factors to diverse laser damage regimes. Ion Beam Sputtering (IBS) is a known technique to provide such high optical quality thin films. Indeed, it allows to achieve high density layers with low absorption and scattering. In this work, various coatings were developed using Bühler IBS technology. Then, total losses were measured using Cavity Ring Down, absorption using Laser Induced Deflection or Laser thermography, and Total Integrated Scatter using dedicated scatterometers. A correlation between the effect of the chosen deposition method and parameters and the measurement performances were made with the aim of a better understanding of the level and the origin of losses in the coatings. Finally, highly reflecting mirror coatings for 1064 nm wavelength were fabricated with different designs and deposition parameters. The results of the different measurements of absorption, scattering and total losses using different equipment are presented and discussed.","PeriodicalId":202227,"journal":{"name":"Laser Damage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139239392","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: 0

Laser-induced damage of CaF2 optics at 193 nm 193 纳米波长下 CaF2 光学元件的激光诱导损伤

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2685720

Jue Wang, Gerald P. Cox, Keith J. Donohue, Ronald W. Davis, Ying Shi, Cody V. Cushman, A. Rezikyan, Galan G. Moore, James E. Tingley, Keith J. Becken, Matthew R. Ross, Michael D. Thomas

引用次数: 0

Characterization of micron scale periodic fluence variation and its possible impact on laser damage 微米尺度周期性通量变化的特征及其对激光损伤的可能影响

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2685137

Isaac L. Bass, Eyal Feigenbaum, James Vickers, Gabriel Guss, W. Carr

引用次数: 0

Study of the probability of growth of silica exit surface damage on the National Ignition Facility (NIF) final optics 国家点火装置（NIF）最终光学器件二氧化硅出口表面损伤增长概率研究

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2688143

Christopher F. Miller, Ryan M. Gini, C. W. Carr

{"title":"Study of the probability of growth of silica exit surface damage on the National Ignition Facility (NIF) final optics","authors":"Christopher F. Miller, Ryan M. Gini, C. W. Carr","doi":"10.1117/12.2688143","DOIUrl":"https://doi.org/10.1117/12.2688143","url":null,"abstract":"Surface damage of silica optics routinely limits the operation of high energy laser systems. Initiated damage can grow upon additional laser pulses, eventually requiring optic removal/replacement. However, when damage is first initiated, small damage sites grow in a stochastic manner, readily parameterized by the size of the damage site, surface of residence, and the fluence and pulse duration of subsequent laser exposures. The National Ignition Facility (NIF), which exposes ~100 m2 of fused silica optics surface to high-energy-nanosecond-laser light on every full system shot, provides an ideal platform to study the growth behavior of laser-induced damage. High-resolution microscopy of individual damage sites is captured as part of the standard NIF recycling loop. However, not all damage sites are repaired depending on the age and quality of the host optic leaving many thousands sub-50-micron damages sites to resume growth after being imaged. By measuring such sites each time an optic is removed for recycling, high-resolution microscopy becomes available for many thousands of sites before and after exposure to various shot sequences on the NIF laser. Using this observed growth, a multi-shot description was fit to predict the likelihood of exit surface damage site growth under exposure from 3ω, nanosecond regime pulses for shot sequence lengths between 1-100 laser exposures. This provides a basis for accurately predicting when a recycled optic will require additional repair.","PeriodicalId":202227,"journal":{"name":"Laser Damage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139240055","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: 0

In-situ scanning tunneling microscopy of ultrafast laser damage on Si (100) surface in ultra-high vacuum 在超高真空中对 Si (100) 表面的超快激光损伤进行原位扫描隧道显微镜观察

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2685136

Zhihan Li, L. Clink, C. Kuz, Jay A. Gupta, Enam Chowdhury

引用次数: 0

Dielectric quantized nanolaminates for laser optics 用于激光光学的介电量子化纳米层压板

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2685241

Thomas Willemsen

引用次数: 0

Laser-induced damage of dielectric-enhanced surface-modified single-point-diamond-turned Al-6061 multiband mirrors 介电增强表面改性单点金刚石翻转 Al-6061 多波段反射镜的激光诱导损伤

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2685665

Jue Wang, L. Wamboldt, Ronald W. Davis, Ying Shi, Todd L. Heck, Craig Ungaro, A. B. Ruffin, Michael D. Thomas

引用次数: 0

Measurement of optical coatings absorption at 1570 nm and simulations of photo-induced modifications of spectral function under high power laser exposure 1570 纳米波长光学镀膜吸收测量以及高功率激光照射下光谱功能光诱导修正模拟

Laser Damage Pub Date : 2023-11-24 DOI: 10.1117/12.2685174

Mathias Soulier, Laurent Gallais, Julien Lumeau, H. Krol, Emilie Steck, Mathieu Boutillier

{"title":"Measurement of optical coatings absorption at 1570 nm and simulations of photo-induced modifications of spectral function under high power laser exposure","authors":"Mathias Soulier, Laurent Gallais, Julien Lumeau, H. Krol, Emilie Steck, Mathieu Boutillier","doi":"10.1117/12.2685174","DOIUrl":"https://doi.org/10.1117/12.2685174","url":null,"abstract":"Free space communications between ground stations and geostationary satellites offer high-speed and secure data transmission, but compensating for atmospheric absorption poses a significant challenge. The need for high levels of beam power to overcome atmospheric losses calls for optics that can withstand strong flux, especially in the continuous wave (CW) regime. In this context, the absorption of optics at 1.5 µm is a critical parameter that must be accurately measured and understood to develop efficient and reliable photonic systems. This study focuses on the absorption of optical coatings at 1570 nm. Lock-In Thermography (LIT) has been developed to measure the total absorption of the coatings with high sensitivity under 1 ppm. A modulated 100 W CW laser is used to induce heating into the coating stack, and the resulting rise in internal temperature is measured with a thermal camera. The LIT experimental setup offers a non-destructive and non-contact measurement technique, making it ideal for assessing the absorption of delicate thin-film coatings. To understand the photo induced effects in a stack of thin film layers subjected to high-power laser heating, a finite element model is developed using COMSOL. The model simulates the index and thickness variations of each layer and predicts the shift in optical function resulting from photo induced effects. The results offer valuable insights into the impact of laser-induced heating on the optical properties of the coatings and provide guidelines for designing robust and reliable photonic systems.","PeriodicalId":202227,"journal":{"name":"Laser Damage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139240344","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: 0