scholarly journals Hexagonal boron nitride nanosheets incorporated antireflective silica coating with enhanced laser-induced damage threshold

2018 ◽  
Vol 6 ◽  
Author(s):  
Jing Wang ◽  
Chunhong Li ◽  
Wenjie Hu ◽  
Wei Han ◽  
Qihua Zhu ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Power ◽  
Damage Threshold ◽  
Fused Silica ◽  
High Power Laser ◽  
Power Laser ◽  
Silica Substrate ◽  
Laser Systems ◽  
Laser Induced Damage ◽  
Ar Coating

Boron nitride (BN) nanosheets incorporated silica antireflective (AR) coating was successfully prepared on fused silica substrate to improve the antilaser-damage ability of transmissive optics used in high-power laser systems. The BN nanosheets were obtained by urea assisted solid exfoliation, and then incorporated into basic-catalyzed silica sols without any further treatment. The transmission electron microscope (TEM) images indicated that the BN nanosheets generally consisted of 2–10 layers. The antireflective BN/$\text{SiO}_{2}$ coating exhibited excellent transmittance as high as 99.89% at 351 nm wavelength on fused silica substrate. The thermal conductivity $0.135~\text{W}\cdot \text{m}^{-1}\cdot \text{K}^{-1}$ of the BN/$\text{SiO}_{2}$ coating with 10% BN addition was about 23% higher than $0.11~\text{W}\cdot \text{m}^{-1}\cdot \text{K}^{-1}$ of the pure $\text{SiO}_{2}$ AR coating. The laser-induced damage threshold (LIDT) of that BN/$\text{SiO}_{2}$ coating is also 23.1% higher than that of pure $\text{SiO}_{2}$ AR coating. This research provides a potential application of BN/$\text{SiO}_{2}$ coatings in high-power laser systems.

ALD anti-reflection coatings at 1ω, 2ω, 3ω, and 4ω for high-power ns-laser application

2018 ◽  
Vol 7 (1-2) ◽  
pp. 23-31 ◽  
Author(s):  
Hao Liu ◽  
Lars Jensen ◽  
Ping Ma ◽  
Detlev Ristau
Keyword(s):  
High Power ◽  
High Surface ◽  
Laser System ◽  
Damage Threshold ◽  
Atomic Layer ◽  
Intensity Difference ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Applications ◽  
Laser Induced Damage

AbstractAtomic layer deposition (ALD) facilitates the deposition of coatings with precise thickness, high surface conformity, structural uniformity, and nodular-free structure, which are properties desired in high-power laser coatings. ALD was studied to produce uniform and stable Al2O3and HfO2single layers and was employed to produce anti-reflection coatings for the harmonics (1ω, 2ω, 3ω, and 4ω) of the Nd:YAG laser. In order to qualify the ALD films for high-power laser applications, the band gap energy, absorption, and element content of single layers were characterized. The damage tests of anti-reflection coatings were carried out with a laser system operated at 1ω, 2ω, 3ω, and 4ω, respectively. The damage mechanism was discussed by analyzing the damage morphology and electric field intensity difference. ALD coatings exhibit stable growth rates, low absorption, and rather high laser-induced damage threshold (LIDT). The LIDT is limited by HfO2as the employed high-index material. These properties indicate the high versatility of ALD films for applications in high-power coatings.

Research on High-Power Laser Induced Damage of Large Aperture Fused Silica

2009 ◽  
Vol 29 (3) ◽  
pp. 756-760 ◽  
Author(s):  
唐顺兴 Tang Shunxing ◽  
欧阳小平 Ouyang Xiaoping ◽  
朱宝强 Zhu Baoqiang ◽  
林尊琪 Lin Zunqi
Keyword(s):  
High Power ◽  
Fused Silica ◽  
High Power Laser ◽  
Power Laser ◽  
Large Aperture ◽  
Laser Induced Damage

scholarly journals Laser pre-exposure to mitigate damage on microparticle-contaminated fused silica surface in high power laser systems

2018 ◽  
Author(s):  
Tylisia Wallace ◽  
Christopher W. Carr ◽  
Rajesh N. Raman ◽  
David Cross ◽  
Mary A. Norton ◽  
...  
Keyword(s):  
High Power ◽  
Silica Surface ◽  
Fused Silica ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Systems

scholarly journals Laser-induced damage growth of fused silica at 351 nm on a large-aperture high-power laser facility

2016 ◽  
Vol 65 (24) ◽  
pp. 246102
Author(s):  
Han Wei ◽  
Feng Bin ◽  
Zheng Kui-Xing ◽  
Zhu Qi-Hua ◽  
Zheng Wan-Guo ◽  
...  
Keyword(s):  
High Power ◽  
Fused Silica ◽  
High Power Laser ◽  
Damage Growth ◽  
Power Laser ◽  
Large Aperture ◽  
Laser Facility ◽  
Laser Induced Damage

High-damage-threshold chirped mirrors for next-generation ultrafast, high-power laser systems

2021 ◽  
pp. 1-1
Author(s):  
Ruiyi Chen ◽  
Yanzhi Wang ◽  
Jianda Shao ◽  
Yu Cao ◽  
Yuhui Zhang ◽  
...  
Keyword(s):  
High Power ◽  
Damage Threshold ◽  
Next Generation ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Systems

scholarly journals Development of high-power laser coatings

2013 ◽  
Vol 1 (1) ◽  
pp. 36-43 ◽  
Author(s):  
Hongji Qi ◽  
Meipin Zhu ◽  
Ming Fang ◽  
Shuying Shao ◽  
Chaoyang Wei ◽  
...  
Keyword(s):  
High Power ◽  
Beam Splitter ◽  
Damage Threshold ◽  
High Power Laser ◽  
Power Laser ◽  
Coating Quality ◽  
Small Aperture ◽  
Beam Splitters ◽  
Laser Induced Damage ◽  
Polarizing Beam Splitter

AbstractLaser resistance and stress-free mirrors, windows, polarizers, and beam splitters up to $400~\mathrm{mm} \times 400~\mathrm{mm} $ are required for the construction of the series SG facilities. In order to improve the coating quality, a program has been in place for the last ten years. For the small-aperture pick-off mirror, the laser-induced damage threshold (LIDT) is above $60~\mathrm{J} / {\mathrm{cm} }^{2} $ (1064 nm, 3 ns), and the reflected wavefront is less than $\lambda / 4~(\lambda = 633~\mathrm{nm} )$. The Brewster-angle polarizing beam splitter ($\Phi 50\times 10~\mathrm{mm} $) shows the best LIDT result, up to $29. 8~\mathrm{J} ~{\mathrm{cm} }^{- 2} $ (1064 nm, 10 ns) for a p-polarized wave in the 2012 damage competition of the XLIV Annual Boulder Damage Symposium. For the larger-aperture mirror and polarizer, the LIDT is above $23~\mathrm{J} ~{\mathrm{cm} }^{- 2} $ (1064 nm, 3 ns) and $14~\mathrm{J} ~{\mathrm{cm} }^{- 2} $ (1064 nm, 3 ns), respectively. The reflected wavefront is less than $\lambda / 3~(\lambda = 633~\mathrm{nm} )$ at the used angle.

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