Influence of electric field distribution on laser induced damage threshold and morphology of high reflectance optical coatings

Abromavičius, Giedrius; Buzelis, Rytis; Drazdys, Ramutis; Melninkaitis, Andrius; Sirutkaitis, Valdas

doi:10.1117/12.752902

Cited by 23 publications

(5 citation statements)

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“…This is a commonly used approach based on the fact that LIDT depends on the intensity level in the material and on the assumption that the behavior of the material is the same if it is deposited as a single layer or embedded in a stack. However, even if there have been investigations on the correlation between the peak field and LIDT, 32,33 there is no clear experimental demonstration in the literature of this approach. Therefore, specific experiments were conducted to assess experimentally that the theoretical LIDT prediction of a given stack can be obtained from the knowledge of its electric field distribution and intrinsic LIDT of materials forming the stack.…”

Section: Stacksmentioning

confidence: 99%

Femtosecond laser-induced damage threshold of electron beam deposited dielectrics for 1-m class optics

et al. 2016

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Section: Stacksmentioning

confidence: 99%

Femtosecond laser-induced damage threshold of electron beam deposited dielectrics for 1-m class optics

et al. 2016

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“…On binary mirror stacks, Apfel modified the upper layers to reduce the electric field intensity in the high index material [21,22]. This approach, also extended to a higher number of layers (also called reduced standing wave design), was proved to improve the LIDT in the short pulse regime [13,[23][24][25]. Ternary mirror designs were also proposed with the idea of using HfO2 only where high electric field intensities could not be avoided, and a higher index material (albeit less damage resistant) elsewhere to reduce the number of pairs necessary to attain the desired reflectivity [26].…”

Section: Introductionmentioning

confidence: 99%

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

Chorel¹,

Lanternier²,

Lavastre³

et al. 2018

Opt. Express

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We report on a numerical optimization of the laser induced damage threshold of multi-dielectric high reflection mirrors in the sub-picosecond regime. We highlight the interplay between the electric field distribution, refractive index and intrinsic laser induced damage threshold of the materials on the overall laser induced damage threshold (LIDT) of the multilayer. We describe an optimization method of the multilayer that minimizes the field enhancement in high refractive index materials while preserving a near perfect reflectivity. This method yields a significant improvement of the damage resistance since a maximum increase of 40% can be achieved on the overall LIDT of the multilayer.

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“…Additionall tailoring of electric field 19 distribution inside the multilayer coating stack can be also applied by changing the thicknesses of substituting layers. It is possible to maintain appropriate spectral performance by shifting maximum peaks of the electric field towards more laser resistant layers 20 , 21 or by inserting layers with intermediate refractive index 22 . After such optimization, shifted peaks are typically located in more resistant low refractive index (high bandgap) layers, e.g.…”

Section: Introductionmentioning

confidence: 99%

Next generation highly resistant mirrors featuring all-silica layers

Tolenis

Grinevičiūtė

Smalakys

et al. 2017

Sci Rep

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A principal possibility to overcome fundamental (intrinsic) limit of pure optical materials laser light resistance is investigated by designing artificial materials with desired optical properties. We explore the suitability of high band-gap ultra-low refractive index material (n less than 1.38 at 550 nm) in the context of highly reflective coatings with enhanced optical resistance. The new generation all-silica (porous/nonporous) SiO2 thin film mirror with 99% reflectivity was prepared by glancing angle deposition (GLAD). Its damage performance was directly compared with state of the art hafnia/silica coating produced by Ion-Beam-Sputtering. Laser-Induced Damage Thresholds (LIDT) of both coatings were measured in nanosecond regime at 355 nm wavelength. Novel approach indicates the potential for coating to withstand laser fluence of at least 65 J/cm2 without reaching intrinsic threshold value. Reported concept can be expanded to virtually any design thus opening a new way of next generation thin film production well suited for high power laser applications.

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Influence of electric field distribution on laser induced damage threshold and morphology of high reflectance optical coatings

Cited by 23 publications

References 0 publications

Femtosecond laser-induced damage threshold of electron beam deposited dielectrics for 1-m class optics

Femtosecond laser-induced damage threshold of electron beam deposited dielectrics for 1-m class optics

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

Next generation highly resistant mirrors featuring all-silica layers

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