Interferometric study of damage mechanisms to optical components by high power infrared radiation

1991 ◽  
Author(s):  
D. Aubert
Keyword(s):  
High Power ◽  
Infrared Radiation ◽  
Optical Components ◽  
Damage Mechanisms ◽  
Interferometric Study

scholarly journals Femtosecond Laser-Induced Damage Characterization of Multilayer Dielectric Coatings

Coatings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 603 ◽  
Author(s):  
Praveen Kumar Velpula ◽  
Daniel Kramer ◽  
Bedrich Rus
Keyword(s):  
Femtosecond Laser ◽  
High Power ◽  
Damage Threshold ◽  
Test Methods ◽  
Optical Components ◽  
Damage Mechanisms ◽  
Coating Failure ◽  
Raster Scan ◽  
Laser Systems ◽  
Laser Induced Damage

The laser-induced damage threshold (LIDT) of optical components is one of the major constraints in developing high-power ultrafast laser systems. Multi-layer dielectric (MLD) coatings-based optical components are key parts of high-power laser systems because of their high damage resistance. Therefore, understanding and characterizing the laser-induced damage of MLD coatings are of paramount importance for developing ultrahigh-intensity laser systems. In this article, we overview the possible femtosecond laser damage mechanisms through damage morphologies in various MLD optical coatings tested in our facility. To evaluate the major contributions to the coating failure, different LIDT test methods (R-on-1, ISO S-on-1 and Raster Scan) were carried out for a high reflective hybrid Ta2O5/HfO2/SiO2 MLD mirror coating at a pulse duration of 37 fs. Different LIDT test methods were compared due to the fact that each test method exposes the different underlying damage mechanisms. For instance, the ISO S-on-1 test at a higher number of laser pulses can bring out the fatigue effects, whereas the Raster Scan method can reveal the non-uniform defect clusters in the optical coating. The measured LIDT values on the sample surface for the tested coating in three test methods are 1.1 J/cm2 (R-on-1), 0.9 J/cm2 (100k-on-1) and 0.6 J/cm2 (Raster Scan) at an angle of incidence of 45 deg. The presented results reveal that the performance of the tested sample is limited by coating defects rather than fatigue effects. Hence, the Raster Scan method is found to be most accurate for the tested coating in evaluating the damage threshold for practical applications. Importantly, this study demonstrates that the testing of different LIDT test protocols is necessary in femtosecond regime to assess the key mechanisms to the coating failure.

Metrology of thin film optical components for high power continuous wave lasers

2021 ◽  
Author(s):  
Camille Petite ◽  
Antonin Moreau ◽  
Hélène Krol ◽  
Catherine Grèzes-Besset ◽  
Julien Lumeau ◽  
...  
Keyword(s):  
Thin Film ◽  
High Power ◽  
Continuous Wave ◽  
Optical Components

Diamond optical components for high-power and high-energy laser applications

2015 ◽  
Author(s):  
Eugene Anoikin ◽  
Alexander Muhr ◽  
Andrew Bennett ◽  
Daniel Twitchen ◽  
Henk de Wit
Keyword(s):  
High Power ◽  
High Energy ◽  
Laser Applications ◽  
Optical Components ◽  
Energy Laser ◽  
High Energy Laser

Monolithic optical components for splitting of high-power beams

2012 ◽  
Author(s):  
M. Jarczynski ◽  
T. Mitra ◽  
M. Ivaneko ◽  
L. Aschke ◽  
C. Wächter ◽  
...  
Keyword(s):  
High Power ◽  
Optical Components

Metrology of large optical components for high power lasers

2003 ◽  
Author(s):  
Jean-Christophe Poncetta ◽  
Vincent Beau ◽  
Jerome Daurios ◽  
Gael Gaborit ◽  
Genevieve Chabassier
Keyword(s):  
High Power ◽  
Optical Components ◽  
High Power Lasers

In vivo high power infrared radiation exposure time dependence of lens light scattering

2008 ◽  
Vol 86 ◽  
pp. 0-0
Author(s):  
R AL-SAQRY ◽  
K GALICHANIN ◽  
Y LI ◽  
PG SÖDERBERG ◽  
K SCHULMEISTER ◽  
...  
Keyword(s):  
Light Scattering ◽  
Time Dependence ◽  
Radiation Exposure ◽  
Exposure Time ◽  
High Power ◽  
Infrared Radiation
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