scholarly journals High surface laser-induced damage threshold of SrB4O7 single crystals under 266-nm (DUV) laser irradiation

2020 ◽  
Vol 28 (20) ◽  
pp. 29239
Author(s):  
Yasunori Tanaka ◽  
Ryota Murai ◽  
Yoshinori Takahashi ◽  
Tsuyoshi Sugita ◽  
Daisetsu Toh ◽  
...  
Keyword(s):  
Single Crystals ◽  
Laser Irradiation ◽  
High Surface ◽  
Damage Threshold ◽  
Surface Laser ◽  
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.

Bulk crystal growth and nonlinear optical characterization of a stilbazolium derivative crystal: 4-[2-(3,4-dimethoxyphenyl)ethenyl]-l methylpyridinium tetraphenylborate (DSTPB) for NLO device fabrication

RSC Advances ◽  
2015 ◽  
Vol 5 (97) ◽  
pp. 79298-79308 ◽  
Author(s):  
K. Senthil ◽  
S. Kalainathan ◽  
Fumio Hamada ◽  
Yoshihiko Kondo
Keyword(s):  
Optical Switching ◽  
Nonlinear Optical ◽  
High Surface ◽  
Damage Threshold ◽  
Device Fabrication ◽  
Laser Damage Threshold ◽  
Organic Crystals ◽  
Bulk Crystal Growth ◽  
Surface Laser

The search for organic crystals with highly efficient nonlinear optical (NLO) properties with a high surface laser damage threshold (LDT) has become more of a demand in the frontier areas of optical switching and communications applications.

Laser-induced damage threshold of silicon under combined millisecond and nanosecond laser irradiation

2017 ◽  
Vol 121 (11) ◽  
pp. 113102 ◽  
Author(s):  
Xueming Lv ◽  
Yunxiang Pan ◽  
Zhichao Jia ◽  
Zewen Li ◽  
Hongchao Zhang ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Damage Threshold ◽  
Nanosecond Laser ◽  
Laser Induced Damage

scholarly journals Recent Advances in Laser-Induced Surface Damage of KH2PO4 Crystal

2020 ◽  
Vol 10 (19) ◽  
pp. 6642 ◽  
Author(s):  
Mingjun Chen ◽  
Wenyu Ding ◽  
Jian Cheng ◽  
Hao Yang ◽  
Qi Liu
Keyword(s):  
Laser Irradiation ◽  
Inertial Confinement Fusion ◽  
Short Pulse ◽  
Damage Threshold ◽  
Damage Mechanism ◽  
Inertial Confinement ◽  
Pulse Laser Irradiation ◽  
Damage Initiation ◽  
Three Stages ◽  
Laser Induced Damage

As a hard and brittle material, KDP crystal is easily damaged by the irradiation of laser in a laser-driven inertial confinement fusion device due to various factors, which will also affect the quality of subsequent incident laser. Thus, the mechanism of laser-induced damage is essentially helpful for increasing the laser-induced damage threshold and the value of optical crystal elements. The intrinsic damage mechanism of crystal materials under laser irradiation of different pulse duration is reviewed in detail. The process from the initiation to finalization of laser-induced damage has been divided into three stages (i.e., energy deposition, damage initiation, and damage forming) to ensure the understanding of laser-induced damage mechanism. It is clear that defects have a great impact on damage under short-pulse laser irradiation. The burst damage accounts for the majority of whole damage morphology, while the melting pit are more likely to appear under high-fluence laser. The three stages of damage are complementary and the multi-physics coupling technology needs to be fully applied to ensure the intuitive prediction of damage thresholds for various initial forms of KDP crystals. The improved laser-induced damage threshold prediction can provide support for improving the resistance of materials to various types of laser-induced damage.

scholarly journals Synthesis and characterization of γ-glycine – a nonlinear optical single crystal for optoelectronic and photonic applications

2017 ◽  
Vol 35 (1) ◽  
pp. 140-150 ◽  
Author(s):  
A. Arputha Latha ◽  
M. Anbuchezhiyan ◽  
C. Charles Kanakam ◽  
K. Selvarani
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Title Compound ◽  
Mechanical Stability ◽  
Second Harmonic ◽  
Potassium Dihydrogen Phosphate ◽  
Damage Threshold ◽  
Dielectric Measurement ◽  
Dihydrogen Phosphate ◽  
Laser Induced Damage

AbstractA single crystal of gamma-glycine (GG), a polymorph of glycine, was synthesized by crystallization. The single crystal of GG was grown from an aqueous solution. The morphology of GG was studied in order to assess its growth facets. The good quality single crystals were subjected to X-ray diffraction studies to reveal their structure. The FT-IR spectral analysis was carried out to confirm the presence of expected functional groups. The UV-Vis analysis was done for GG single crystals to determine the optical transparency and band gap. Simultaneous TG-DTA analysis was employed to understand the thermal and physicochemical stability of the title compound. The mechanical stability and laser stability of GG single crystal were studied using Vickers microhardness test and laser induced damage threshold on different planes of the crystal to reveal its anisotropic nature. The dielectric measurement was carried out as a function of frequency and the results were discussed. The existence of second harmonic generation (SHG) of the title compound was confirmed by Kurtz-Perry powder technique. The SHG effective nonlinearity and particle size dependence of GG powder sample were compared with a standard reference material: potassium dihydrogen phosphate (KDP).

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