Localized CO2 laser treatment and post-heating process to reduce the growth coef f icient of fused silica surface damage

2011 ◽  
Vol 9 (6) ◽  
pp. 061405-61407 ◽  
Author(s):  
徐世珍 Shizhen Xu ◽  
祖小涛 Xiaotao Zu ◽  
袁晓东 Xiaodong Yuan
Keyword(s):  
Laser Treatment ◽  
Co2 Laser ◽  
Silica Surface ◽  
Surface Damage ◽  
Fused Silica ◽  
Heating Process ◽  
Co2 Laser Treatment

scholarly journals Correlation between Photoluminescence Properties of Surface Defects and Laser-Induced Damage Threshold of Fused Silica

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Qiao Chen ◽  
He Wang ◽  
Rucheng Dai ◽  
Zhongping Wang ◽  
Xiaoping Tao ◽  
...  
Keyword(s):  
Laser Treatment ◽  
Co2 Laser ◽  
Surface Defects ◽  
Damage Threshold ◽  
Threshold Value ◽  
Fused Silica ◽  
Process Technology ◽  
Co2 Laser Treatment ◽  
Laser Induced Damage

Laser-induced damage threshold is the main limitation for fused silica optics in high-power laser applications. The existence of various defects near the surface is the key factor for the degradation of the threshold. In this work, the photoluminescence spectra at different regions of the damaged and recovered fused silica samples are recorded to analyze the correlation between photoluminescence of surface defects and laser-induced damage threshold. The experimental data concluded the inverse proportional correlation between fluorescence and laser-induced damage threshold value. The weak photoluminescence is the guarantee of the high laser-induced damage threshold, and then the higher local Si nanocluster concentration corresponds with the higher laser-induced damage threshold value for the fused silica optics after CO2 laser treatment. The investigation reveals that photoluminescence measurement can be employed to check the quality of pristine fused silica and evaluate the tendency of the laser-induced damage threshold value. The current results are helpful for understanding the evolution of interaction from CO2 laser treatment and fused silica optics and can provide the guide of process technology for the high quality of fused silica optics.

Antibacterial and Odontogenesis Efficacy of Mineral Trioxide Aggregate Combined with CO2 Laser Treatment

2015 ◽  
Vol 41 (7) ◽  
pp. 1073-1080 ◽  
Author(s):  
Tuan-Ti Hsu ◽  
Chia-Hung Yeh ◽  
Chia-Tze Kao ◽  
Yi-Wen Chen ◽  
Tsui-Hsien Huang ◽  
...  
Keyword(s):  
Laser Treatment ◽  
Co2 Laser ◽  
Mineral Trioxide Aggregate ◽  
Co2 Laser Treatment

Surface effects in Cu0.64Zn0.36 alloy produced by CO2 laser treatment

2005 ◽  
Vol 59 (29-30) ◽  
pp. 3909-3912 ◽  
Author(s):  
L.V. Ponce ◽  
M.P. Hernandez ◽  
T. Flores ◽  
D. Morejon ◽  
J.L. Peña
Keyword(s):  
Laser Treatment ◽  
Co2 Laser ◽  
Surface Effects ◽  
Co2 Laser Treatment

Successful CO2 laser treatment of naevus lipomatosus cutaneous superficialis

2010 ◽  
Vol 35 (5) ◽  
pp. 559-560 ◽  
Author(s):  
S. Fatah ◽  
R. Ellis ◽  
D. C. Seukeran ◽  
A. J. Carmichael
Keyword(s):  
Laser Treatment ◽  
Co2 Laser ◽  
Co2 Laser Treatment

scholarly journals Early Regenerative Modifications of Human Postmenopausal Atrophic Vaginal Mucosa Following Fractional CO2 Laser Treatment

2018 ◽  
Vol 6 (1) ◽  
pp. 6-14 ◽  
Author(s):  
Stefano Salvatore ◽  
Katlein França ◽  
Torello Lotti ◽  
Marta Parma ◽  
Sonia Palmieri ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Laser Treatment ◽  
Co2 Laser ◽  
Vaginal Mucosa ◽  
Structural Components ◽  
Related Factors ◽  
Fractional Co2 Laser ◽  
Collagen Iii ◽  
Co2 Laser Treatment ◽  
Stimulation Of

BACKGROUND: Postmenopausal women experience undesired symptoms that adversely affect their quality of life. In the recent years, a specific 12 - week fractional CO2 laser treatment has been introduced, with highly significant relief of symptoms.AIM: The aim of this paper is the identification of the early modifications of structural components of atrophic vaginal mucosa induced by laser irradiation, which is responsible for the restorative processes.MATERIAL AND METHODS: We investigated by microscopical, ultrastructural and biochemical methods the modifications of the structural components of postmenopausal atrophic vaginal mucosa tissues after 1 hour following a single fractional laser CO2 application.RESULTS: In one hour, the mucosal epithelium thickens, with the maturation of epithelial cells and desquamation at the epithelial surface. In the connective tissue, new papillae indenting the epithelium with newly formed vessels penetrating them, new thin fibrils of collagen III are also formed in a renewed turnover of components due to the increase of metalloproteinase - 2. Specific features of fibroblasts support stimulation of their activity responsible of the renewal of the extracellular matrix, with an increase of mechanical support as connective tissue and stimulation of growth and maturation to epithelium thanks to new vessels and related factors delivered.CONCLUSION: We found the activation of regenerative mechanisms expressed both in the connective tissue - with the formation of new vessels, new papillae, and new collagen - and in the epithelium with the associated thickening and desquamation of cells at the mucosal surface.

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