Extensive time-resolved investigation of laser-induced damage fatigue of single layer dielectric coating

2018 ◽  
Author(s):  
Linas Smalakys ◽  
Balys Momgaudis ◽  
Mikas Vengris ◽  
Robertas Grigutis ◽  
Andrius Melninkaitis
Keyword(s):  
Single Layer ◽  
Dielectric Coating ◽  
Time Resolved ◽  
Laser Induced Damage

scholarly journals Comparison of Single-Layer and Double-Layer Anti-Reflection Coatings Using Laser-Induced Damage Threshold and Photothermal Common-Path Interferometry

Coatings ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 20 ◽  
Author(s):  
Caspar Clark ◽  
Riccardo Bassiri ◽  
Iain Martin ◽  
Ashot Markosyan ◽  
Peter Murray ◽  
...  
Keyword(s):  
Double Layer ◽  
Single Layer ◽  
Damage Threshold ◽  
Common Path ◽  
Laser Induced Damage

Dynamics of Ultrafast Laser Induced Damage in Single Crystal Ni-based Superalloy During Machining

2006 ◽  
Vol 980 ◽  
Author(s):  
Joel P. McDonald ◽  
Shuwei Ma ◽  
John A. Nees ◽  
Tresa M. Pollock ◽  
Steven M. Yalisove
Keyword(s):  
Shock Wave ◽  
Laser Fluence ◽  
Ultrafast Laser ◽  
Laser Exposure ◽  
Mechanical Shock ◽  
Incident Laser ◽  
Machining Time ◽  
Time Resolved ◽  
Pump Probe ◽  
Laser Induced Damage

AbstractPump-probe imaging of femtosecond pulsed laser ablation was performed to investigate the mechanical shock induced on an intermetallic superalloy CMSX-4 during femtosecond laser machining. Time resolved shadowgraphic images were collected of the shock wave produced in the air above the target following laser exposure (0-10.3 nanoseconds). The dimensions of the shock wave were measured as a function of delay time and laser fluence (1.27 J/cm2 - 62.8 J/cm2). Time-resolved shadowgraphic images of the ablation event will be presented, and the corresponding damage morphology as a function of incident laser fluence will be discussed.

scholarly journals Transient Dynamics Measurement of Light-material Interaction for Laser Optics

2019 ◽  
Vol 215 ◽  
pp. 03005
Author(s):  
Zhichao Liu ◽  
Feng Geng ◽  
Yaguo Li ◽  
Qinghua Zhang ◽  
Jian Wang ◽  
...  
Keyword(s):  
Physical Mechanism ◽  
Early Stage ◽  
Laser Damage ◽  
Time Duration ◽  
Optical Elements ◽  
Time Resolved ◽  
Nanosecond Pulsed Laser ◽  
Laser Induced Damage ◽  
Light Material ◽  
Physical Quantities

Laser damage performance is an important parameter to evaluate the quality of high power laser optical components. Understanding the physical mechanism of the interaction between laser and optical material is of great significance for improving the laser damage resistance of optical elements. For nanosecond pulsed laser, the time duration of laser-induced damage is ultra-short, and the measurement of related physical quantities is very difficult. Therefore, the Time Resolved Pump and Probe (TRPP) technique can effectively solve this problem. TRPP shadow imaging can obtain the transient dynamic information in range of picosecond to microsecond, including the plasma formation in the early stage, the shock wave propagation, the crack expanding, material ejection and other phenomena. Moreover, the ultra-fast physical quantities can be accurately measured by employing two detective beams with perpendicular polarization directions, for example S and P polarization light. All those information provides effective experimental data to reveal the physical mechanism of damage process.

Time-resolved digital holography: a versatile tool for femtosecond laser-induced damage studies

2009 ◽  
Author(s):  
Andrius Melninkaitis ◽  
Tadas Balciunas ◽  
Andrius Vanagas ◽  
Valdas Sirutkaitis
Keyword(s):  
Femtosecond Laser ◽  
Digital Holography ◽  
Time Resolved ◽  
Versatile Tool ◽  
Laser Induced Damage

scholarly journals Quantitative investigation of laser-induced damage fatigue in HfO2 and ZrO2 single layer coatings

2020 ◽  
Vol 28 (17) ◽  
pp. 25335
Author(s):  
Linas Smalakys ◽  
Evelina Drobužaitė ◽  
Balys Momgaudis ◽  
Robertas Grigutis ◽  
Andrius Melninkaitis
Keyword(s):  
Single Layer ◽  
Quantitative Investigation ◽  
Laser Induced Damage

scholarly journals Исследование спонтанной эмиссии в брэгговских монослойных квантовых ямах InAs

2018 ◽  
Vol 52 (7) ◽  
pp. 736
Author(s):  
Г. Позина ◽  
М.А. Калитеевский ◽  
Е.В. Никитина ◽  
А.Р. Губайдуллин ◽  
К.А. Иванов ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Single Layer ◽  
Bragg Condition ◽  
Purcell Factor ◽  
Bragg Structure ◽  
Additional Line ◽  
Time Resolved ◽  
Substantial Modification ◽  
Gaas Matrix ◽  
Time Resolved Photoluminescence

AbstractThe time-resolved photoluminescence of a Bragg structure formed by InAs single-layer quantum wells in a GaAs matrix is investigated experimentally. The comparison of photoluminescence spectra recorded from the edge and the surface of the sample indicates that Bragg ordering of the quantum wells leads to substantial modification of the spectra, in particular, to the appearance of additional modes. The spectrum recorded at the edge of the sample features a single line corresponding to the exciton ground state. In the spectrum recorded at the surface, an additional line whose frequency and propagation angle correspond to the Bragg condition for quantum wells, appears at high excitation levels. The calculation of the modal Purcell factor explains the fact that spontaneous emission is enhanced only for specific propagation angles and frequencies, rather than for all angles and frequencies satisfying the Bragg condition.

Absorption and laser-induced damage threshold of single-layer HfO2 film

2010 ◽  
Vol 22 (11) ◽  
pp. 2596-2598
Author(s):  
李淑红 Li Shuhong ◽  
贺洪波 He Hongbo ◽  
刘晓凤 Liu Xiaofeng ◽  
单永光 Shan Yongguang ◽  
周明 Zhou Ming ◽  
...  
Keyword(s):  
Single Layer ◽  
Damage Threshold ◽  
Hfo2 Film ◽  
Laser Induced Damage

Time-resolved holographic imaging of femtosecond laser-induced damage process in dielectric thin films

2016 ◽  
Author(s):  
Andrius Melninkaitis ◽  
Balys Momgaudis ◽  
Robertas Grigutis ◽  
Linas Smalakys ◽  
Nerijus Šiaulys ◽  
...  
Keyword(s):  
Thin Films ◽  
Femtosecond Laser ◽  
Dielectric Thin Films ◽  
Time Resolved ◽  
Holographic Imaging ◽  
Damage Process ◽  
Laser Induced Damage

Influence of Laser-Conditioning on Laser-Induced Damage Properties of ZnSe Thin Films

2012 ◽  
Vol 602-604 ◽  
pp. 1437-1443
Author(s):  
Feng Zou ◽  
Jun Qi Xun ◽  
Jun Hong Su ◽  
Jian Bo Ma
Keyword(s):  
Thin Films ◽  
Energy Density ◽  
Wave Length ◽  
Single Layer ◽  
Damage Threshold ◽  
Processing Parameters ◽  
Spot Size ◽  
Pulse Number ◽  
Optical Films ◽  
Laser Induced Damage

With the development of high power laser systems, laser protection of optical components becomes more and more important. In order to enhance the laser-induced damage capability of optical films components, besides advanced methods and processes, post-treatment has significant influence on the laser-induced damage threshold (LIDT) of thin films. Q switch Nd:YAG laser of the working wave length at 1064nm, was used to post process on ZnSe single layer films with thickness of /2 (=1064nm) deposited by thermal evaporation, and the laser-induced damage and optical properties were investigated. By changing the energy density and pulse number under the spot size remained a fixed value, their effects on thin films damage threshold were studied respectively, the optimal processing parameters were obtained: energy density is 3.0 J/cm2 and pulse number is 1.The LIDT of post processed ZnSe films was improved from 5.0J/cm2 to 8.2J/cm2.

Sign in / Sign up

Export Citation Format

Share Document