Influence of Laser-Conditioning on Defects of SiO<sub>2</sub>Mono-Layer Films

Xiao, 李笑 Li; Xiaofeng, 刘晓凤 Liu; Yuanan, 赵元安 Zhao; Jianda, 邵建达 Shao

doi:10.3788/cjl20103706.1626

Cited by 2 publications

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“…But their researches usually focus on the preparation of thin films, such as a deposition method, films design, overcoat, standing wave field , temperature field and so on [2]. Studies have shown that post processing of thin films can effectively improve the laser-induced damage threshold [3][4][5][6][7][8] . Heat-treatment, laser conditioning and ion post-treatment are commonly methods [3] .…”

Section: Introductionmentioning

confidence: 99%

“…Laser pretreatment is to use the lower laser fluence of threshold to irradiate optical element surface, which can reduce defects of the films at a certain extent in the process, so this way improves the laser-induced damage threshold of films [4] . There are a lot of researches about laser pretreatment at domestic and abroad , Congjuan Wang studied the influence of laser pretreatment on single ZrO 2 films properties [3] , It found that laser pretreatment process can reduce defects at a certain extent, and improve the damage threshold, but there is no obvious improvement action to absorption and spectra of the films, the study of Arenberg showed that 1064 nm wavelength of the laser pretreatment made damage threshold increase by 40%, but the 532 nm wavelength of laser pretreatment had no significant effect on the damage threshold of the films [5] .…”

Section: Introductionmentioning

confidence: 99%

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Influence of Laser-Conditioning on Laser-Induced Damage Properties of ZnSe Thin Films

Zou

Xun

et al. 2012

AMR

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With the development of high power laser systems, laser protection of optical components becomes more and more important. In order to enhance the laser-induced damage capability of optical films components, besides advanced methods and processes, post-treatment has significant influence on the laser-induced damage threshold (LIDT) of thin films. Q switch Nd:YAG laser of the working wave length at 1064nm, was used to post process on ZnSe single layer films with thickness of /2 (=1064nm) deposited by thermal evaporation, and the laser-induced damage and optical properties were investigated. By changing the energy density and pulse number under the spot size remained a fixed value, their effects on thin films damage threshold were studied respectively, the optimal processing parameters were obtained: energy density is 3.0 J/cm2 and pulse number is 1.The LIDT of post processed ZnSe films was improved from 5.0J/cm2 to 8.2J/cm2.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Laser-Conditioning on Laser-Induced Damage Properties of ZnSe Thin Films

Zou

Xun

et al. 2012

AMR

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Effect of Laser Conditioning on Surface Modification and Laser Damage Resistance of SiO2 Antireflection Film

et al. 2023

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SiO2 sol-gel antireflection film coated on fused silica can reduce the reflection loss and improve the transmittance of the optical component, although it is still prone to laser induced damage. Laser conditioning is an effective way to improve the laser induced damage threshold (LIDT) of SiO2 sol-gel antireflection film. In this paper, single-layer SiO2 sol-gel antireflection films pretreated by triple-frequency laser with different parameters are characterized by the macroscopical parameters, such as transmittance, refractive index, and thickness. The law of surface modification and the defect removal mechanism of the SiO2 sol-gel antireflection film by laser conditioning are obtained. It is found that laser conditioning can reduce the thickness of the film and introduce densification. In addition, laser conditioning can eliminate micro-defects, such as vacancies and voids in the preparation of SiO2 sol-gel antireflection films, which is the main reason to improve the laser damage resistance of films. Finally, the laser conditioning process with three step laser energy combinations of (0.2–0.6–1.0) Fth0 (zero damage threshold) is the best one to obtain high transmittance, and excellent effects on structure modification and defect removal of films. The research in this paper provides data support for the engineering application and mechanism research of laser conditioning.

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Influence of Laser-Conditioning on Defects of SiO₂Mono-Layer Films

Cited by 2 publications

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Influence of Laser-Conditioning on Laser-Induced Damage Properties of ZnSe Thin Films

Influence of Laser-Conditioning on Laser-Induced Damage Properties of ZnSe Thin Films

Effect of Laser Conditioning on Surface Modification and Laser Damage Resistance of SiO2 Antireflection Film

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Influence of Laser-Conditioning on Defects of SiO2Mono-Layer Films

Cited by 2 publications

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Influence of Laser-Conditioning on Laser-Induced Damage Properties of ZnSe Thin Films

Influence of Laser-Conditioning on Laser-Induced Damage Properties of ZnSe Thin Films

Effect of Laser Conditioning on Surface Modification and Laser Damage Resistance of SiO2 Antireflection Film

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Influence of Laser-Conditioning on Defects of SiO₂Mono-Layer Films