ATR-FTIR spectroscopic studies on density changes of fused silica induced by localized CO
                    <sub>2</sub>
                    laser treatment

Zhang, Chuanchao; Zhang, Lijuan; Liao, Wei; Yan, Zhonghua; Chen, Jing; Jiang, Yilan; Wang, Haijun; Luan, Xiaoyu; Ye, Yayun; Zheng, Wanguo; Yuan, Xiaodong

doi:10.1088/1674-1056/24/2/024220

Cited by 12 publications

(3 citation statements)

References 30 publications

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“…In figure 4(b), when the pulse duration changes from 40μs to 50μs, the fictive temperature increases from 1426K to 1981K. The relationship between fictive temperature and the density of fused silica is given in the study as equation ( 5) 19 . According to equation ( 5) and the simulated fictive temperature, the density of fused silica at different pulse durations changes linearly from the initial 2.2003g/cm 3 to the final 2.2062 g/cm 3 .…”

Section: Resultsmentioning

confidence: 99%

A mathematical model for high precision laser beam figuring of fused silica based on densification effect

Han,

Wan,

Peng

et al. 2023

AOPC 2023: Laser Technology and Applications; And Optoelectronic Devices and Integration

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Section: Resultsmentioning

confidence: 99%

A mathematical model for high precision laser beam figuring of fused silica based on densification effect

Han,

Wan,

Peng

et al. 2023

AOPC 2023: Laser Technology and Applications; And Optoelectronic Devices and Integration

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“…[16] The angle of Si-O-Si bond, θ , is related to the density of surface materials. [18,19] The calculated surface molecular structure parameters are given and compared in Fig. 2(e).…”

Section: Surface Molecular Structurementioning

confidence: 99%

Improvement of laser damage thresholds of fused silica by ultrasonic-assisted hydrofluoric acid etching

Yan

Yang

et al. 2017

Chinese Phys. B

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Polished fused silica samples were etched for different durations by using hydrofluoric (HF) acid solution with HF concentrations in an ultrasonic field. Surface and subsurface polishing residues and molecular structure parameters before and after the etching process were characterized by using a fluorescence microscope and infrared (IR) spectrometer, respectively. The laser induced damage thresholds (LIDTs) of the samples were measured by using pulsed nanosecond laser with wavelength of 355 nm. The results showed that surface and subsurface polishing residues can be effectively reduced by the acid etching process, and the LIDTs of fused silica are significantly improved. The etching effects increased with the increase of the HF concentration from 5 wt.% to 40 wt.%. The amount of polishing residues decreased with the increase of the etching duration and then kept stable. Simultaneously, with the increase of the etching time, the mechanical strength and molecular structure were improved.

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“…Fused silica is one of the most important optical components in fusion class laser systems, such as the National Ignition Facility (NIF) in USA, the Laser Mega Joule in France and the SG-III laser facility in China. [1] With the improvement of facility fluence, the various defects (such as scratches, indentations) and contaminations on optics will lead to the various negative effects on the system. For example, the formation of a strong light field resulting from the light modulation of defects, [2] the appearance of localized high temperature because of laser energy absorbed by impurities, [3] etc., each will lead to an easier damage event of optics.…”

Section: Introductionmentioning

confidence: 99%

Influence of secondary treatment with CO ₂ laser irradiation for mitigation site on fused silica surface

et al. 2016

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The ablation debris and raised rim, as well as residual stress and deep crater will be formed during the mitigation of damage site with a CO 2 laser irradiation on fused silica surface, which greatly affects the laser damage resistance of optics. In this study, the experimental study combined with numerical simulation is utilized to investigate the effect of the secondary treatment on a mitigated site by CO 2 laser irradiation. The results indicate that the ablation debris and the raised rim can be completely eliminated and the depth of crater can be reduced. Notable results show that the residual stress of the mitigation site after treatment will reduce two-thirds of the original stress. Finally, the elimination and the controlling mechanism of secondary treatment on the debris and raised rim, as well as the reasons for changing the profile and stress are analyzed. The results can provide a reference for the optimization treatment of mitigation sites by CO 2 laser secondary treatment.

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ATR-FTIR spectroscopic studies on density changes of fused silica induced by localized CO ₂ laser treatment

Cited by 12 publications

References 30 publications

A mathematical model for high precision laser beam figuring of fused silica based on densification effect

A mathematical model for high precision laser beam figuring of fused silica based on densification effect

Improvement of laser damage thresholds of fused silica by ultrasonic-assisted hydrofluoric acid etching

Influence of secondary treatment with CO ₂ laser irradiation for mitigation site on fused silica surface

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ATR-FTIR spectroscopic studies on density changes of fused silica induced by localized CO 2 laser treatment

Cited by 12 publications

References 30 publications

A mathematical model for high precision laser beam figuring of fused silica based on densification effect

A mathematical model for high precision laser beam figuring of fused silica based on densification effect

Improvement of laser damage thresholds of fused silica by ultrasonic-assisted hydrofluoric acid etching

Influence of secondary treatment with CO 2 laser irradiation for mitigation site on fused silica surface

Contact Info

Product

Resources

About

ATR-FTIR spectroscopic studies on density changes of fused silica induced by localized CO ₂ laser treatment

Influence of secondary treatment with CO ₂ laser irradiation for mitigation site on fused silica surface