New analysis on laser-induced damage mechanism of CCD device

2009 ◽  
Author(s):  
Jingjing Dai ◽  
Zhiyong Wang
Keyword(s):  
Damage Mechanism ◽  
Laser Induced Damage

Analysis of laser-induced damage mechanism in Si photodiode based on parameter extraction of equivalent circuit

2018 ◽  
Vol 47 (1) ◽  
pp. 106002
Author(s):  
师宇斌 Shi Yubin ◽  
张检民 Zhang Jianmin ◽  
张震 Zhang Zhen ◽  
林新伟 Lin Xinwei ◽  
程德艳 Cheng Deyan ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Damage Mechanism ◽  
Parameter Extraction ◽  
Laser Induced Damage

scholarly journals Experimental research of laser-induced damage mechanism of the sol-gel SiO2 and IBSD SiO2 thin films

2006 ◽  
Vol 55 (3) ◽  
pp. 1201
Author(s):  
Chen Xi-Quan ◽  
Zu Xiao-Tao ◽  
Zheng Wan-Guo ◽  
Jiang Xiao-Dong ◽  
Lyu Hai-Bing ◽  
...  
Keyword(s):  
Thin Films ◽  
Experimental Research ◽  
Sol Gel ◽  
Damage Mechanism ◽  
Laser Induced Damage

scholarly journals Laser-Induced Damage Initiation and Growth of Optical Materials

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Jingxia Yu ◽  
Xia Xiang ◽  
Shaobo He ◽  
Xiaodong Yuan ◽  
Wanguo Zheng ◽  
...  
Keyword(s):  
Rear Surface ◽  
Field Enhancement ◽  
Damage Mechanism ◽  
Theoretical Research ◽  
Experimental Investigations ◽  
Integrated Analysis ◽  
Electron Avalanche ◽  
Damage Initiation ◽  
Laser Induced Damage ◽  
Thermal Absorption

The lifetime of optical components is determined by the combination of laser-induced damage initiation probability and damage propagation rate during subsequent laser shots. This paper reviews both theoretical and experimental investigations on laser-induced damage initiation and growth at the surface of optics. The damage mechanism is generally considered as thermal absorption and electron avalanche, which play dominant roles for the different laser pulse durations. The typical damage morphology in the surface of components observed in experiments is also closely related to the damage mechanism. The damage crater in thermal absorption process, which can be estimated by thermal diffusion model, is typical distortion, melting, and ablation debris often with an elevated rim caused by melted material flow and resolidification. However, damage initiated by electron avalanche is often accompanied by generation of plasma, crush, and fracture, which can be explained by thermal explosion model. Damage growth at rear surface of components is extremely severe which can be explained by several models, such as fireball growth, impact crater, brittle fracture, and electric field enhancement. All the physical effects are not independent but mutually coupling. Developing theoretical models of multiphysics coupling are an important trend for future theoretical research. Meanwhile, more attention should be paid to integrated analysis both in theory and experiment.

scholarly journals Influence of the Secondary Ion Beam Source on the Laser Damage Mechanism and Stress Evolution of IBS Hafnia Layers

2020 ◽  
Vol 11 (1) ◽  
pp. 189
Author(s):  
Igor Stevanovic ◽  
Zoltán Balogh-Michels ◽  
Andreas Bächli ◽  
Valentin J. Wittwer ◽  
Thomas Südmeyer ◽  
...  
Keyword(s):  
Ion Beam ◽  
Damage Mechanism ◽  
Amorphous Structure ◽  
Ion Source ◽  
Film Stress ◽  
Maximum Compressive Stress ◽  
Laser Applications ◽  
Ion Energy ◽  
Laser Induced Damage ◽  
Secondary Ion

Ion beam sputtered hafnia is a preferred high index coating material for laser applications. It exhibits a mostly amorphous structure and an adequate laser-induced damage (LIDT) threshold. In this work, we investigated the influence of an assisting ion source on the film stress as well as the LIDT of the sputtered hafnia layers. The stress increases with an increasing ion energy of the assisting ion beam. We identified a maximum compressive stress of 3–3.5 GPa before the film cracks, blisters, and delaminates. Different states of stress lead to different laser-induced damage thresholds and damage morphologies.

scholarly journals Recent Advances in Laser-Induced Surface Damage of KH2PO4 Crystal

2020 ◽  
Vol 10 (19) ◽  
pp. 6642 ◽  
Author(s):  
Mingjun Chen ◽  
Wenyu Ding ◽  
Jian Cheng ◽  
Hao Yang ◽  
Qi Liu
Keyword(s):  
Laser Irradiation ◽  
Inertial Confinement Fusion ◽  
Short Pulse ◽  
Damage Threshold ◽  
Damage Mechanism ◽  
Inertial Confinement ◽  
Pulse Laser Irradiation ◽  
Damage Initiation ◽  
Three Stages ◽  
Laser Induced Damage

As a hard and brittle material, KDP crystal is easily damaged by the irradiation of laser in a laser-driven inertial confinement fusion device due to various factors, which will also affect the quality of subsequent incident laser. Thus, the mechanism of laser-induced damage is essentially helpful for increasing the laser-induced damage threshold and the value of optical crystal elements. The intrinsic damage mechanism of crystal materials under laser irradiation of different pulse duration is reviewed in detail. The process from the initiation to finalization of laser-induced damage has been divided into three stages (i.e., energy deposition, damage initiation, and damage forming) to ensure the understanding of laser-induced damage mechanism. It is clear that defects have a great impact on damage under short-pulse laser irradiation. The burst damage accounts for the majority of whole damage morphology, while the melting pit are more likely to appear under high-fluence laser. The three stages of damage are complementary and the multi-physics coupling technology needs to be fully applied to ensure the intuitive prediction of damage thresholds for various initial forms of KDP crystals. The improved laser-induced damage threshold prediction can provide support for improving the resistance of materials to various types of laser-induced damage.

The laser-induced damage mechanism of amorphous and crystalline Sc2O3 films

Vacuum ◽  
2021 ◽  
pp. 110332
Author(s):  
Pengfei Kong ◽  
Yunti Pu ◽  
Ping Ma ◽  
Jiliang Zhu
Keyword(s):  
Damage Mechanism ◽  
Laser Induced Damage

Laser Induced Damage Threshold Measurements at the Microscopic Level

1992 ◽  
Vol 285 ◽  
Author(s):  
Allen D. Zwan ◽  
David R. Miller
Keyword(s):  
Single Crystal Silicon ◽  
Damage Threshold ◽  
Damage Mechanism ◽  
Laser Damage Threshold ◽  
Laser Damage ◽  
Plasma Damage ◽  
Crystal Silicon ◽  
Thermally Induced ◽  
Laser Induced Damage

ABSTRACTWe have (tudied the laser damage threshold to silver films (500Å - 1000Å) grown on single crystal silicon <100>, in a newly developed laser damage UHV system at pressures of 10−1 torr. A 1.06μm Nd:Glass laser is used to damage the mirror surfaces in 1-on-1 pulse studies. In-situ damage characterization includes Auger, reflectivity of the primary beam, diffuse scattering of a helium-neon laser, and mass spectrometry detection of desorbed surface species. External characterization includes optical microscopy and SEM. All in-situ damage probes are well correlated and baseline damage occurs at fluences near 3.4 MW/cm2. Time-of-flight to the mass spectrometer shows ejected particles with energies in the 5 to 10 eV range indicating a plasma damage mechanism. Prior to typical thermally induced damage the external microscopy shows well defined precursor morphology changes which appear as feather-like microstructure at the submicron level.

Layer by layer exposure of subsurface defects and laser-induced damage mechanism of fused silica

2020 ◽  
Vol 508 ◽  
pp. 145186
Author(s):  
Bo Li ◽  
Chunyuan Hou ◽  
Chengxiang Tian ◽  
Jianlei Guo ◽  
Xia Xiang ◽  
...  
Keyword(s):  
Damage Mechanism ◽  
Fused Silica ◽  
Layer By Layer ◽  
Laser Induced Damage ◽  
Subsurface Defects

scholarly journals Analysis of the Damage Mechanism Related to CO2 Laser Cochleostomy on Guinea Pig Cochlea

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Xiang Liu ◽  
Xiao-qing Qian ◽  
Rui Ma ◽  
Fang-Lu Chi ◽  
Dong-Dong Ren
Keyword(s):  
Guinea Pig ◽  
Inner Ear ◽  
Round Window ◽  
Organ Of Corti ◽  
Damage Mechanism ◽  
Round Window Membrane ◽  
Control Group ◽  
Guinea Pig Cochlea ◽  
Brainstem Response ◽  
Laser Induced Damage

Different types of lasers have been used in inner ear surgery. Therefore, it is of the utmost importance to avoid damage to the inner ear (e.g., hyperthermia and acoustic effects) caused by the use of such lasers. The aim of this study was to use a high powered fibre-enabled CO2 laser (10 W, 606 J/cm2) to perform cochleostomies on guinea pig cochlea and to investigate the possible laser-induced damage mechanisms. The temperature changes in the round window membrane, auditory evoked brainstem response, and morphological of the hair cells were measured and recorded before and after laser application. All of the outcomes differed in comparison with the control group. A rise in temperature and subsequent increased hearing loss were observed in animals that underwent surgery with a 10 W CO2 laser. These findings correlated with increased injury to the cochlear ultrastructure and a higher positive expression of E-cadherin and β-catenin in the damaged organ of Corti. We assume that enhanced cell-cell adhesion and the activated β-catenin-related canonical Wnt-signalling pathway may play a role in the protection of the cochlea to prevent further damage.

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