scholarly journals Robust optimization of the laser induced damage threshold of dielectric mirrors for high power lasers

2018 ◽  
Vol 26 (9) ◽  
pp. 11764 ◽  
Author(s):  
Marine Chorel ◽  
Thomas Lanternier ◽  
Éric Lavastre ◽  
Nicolas Bonod ◽  
Bruno Bousquet ◽  
...  
Keyword(s):  
Robust Optimization ◽  
High Power ◽  
Damage Threshold ◽  
High Power Lasers ◽  
Dielectric Mirrors ◽  
Laser Induced Damage

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.

Impact of organic contamination on 1064-nm laser-induced damage threshold of dielectric mirrors

2006 ◽  
Author(s):  
A. Pereira ◽  
J.-G. Coutard ◽  
S. Becker ◽  
I. Tovena ◽  
P. Bouchut ◽  
...  
Keyword(s):  
Damage Threshold ◽  
Organic Contamination ◽  
Dielectric Mirrors ◽  
Laser Induced Damage

scholarly journals Ultra high damage threshold optics for high power lasers

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Yurina Michine ◽  
Hitoki Yoneda
Keyword(s):  
High Power ◽  
Damage Threshold ◽  
High Power Lasers

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.

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