Temporary laser damage threshold enhancement by laser conditioning of antireflection-coated glass

Frink, ME; Arenberg, Jonathan W.; Mordaunt, D. W.; Seitel, S. C.; Babb, M. T.; Teppo, E. A.

doi:10.1063/1.98407

Cited by 27 publications

(11 citation statements)

References 3 publications

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“…Up to now, two main mechanisms were put forward to explain this phenomenon, one is cleaning of contamination and adsorbent water [3] , and another is electronic defect elimination mechanism [2] . If the discussion was based on the practical use of laser coatings in the high power laser systems, laser conditioning is often believed to be related to the mechanical stabilization of defects [4] .…”

Section: Introductionmentioning

confidence: 99%

<title>Laser conditioning of dielectric oxide mirror coatings at 1064 nm</title>

et al. 2004

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Laser conditioning effects of the dielectric oxide mirror coatings with different designs were investigated. Simple quarter-wave ZrO 2 :Y 2 O 3 /SiO 2 mirrors and half-wave SiO 2 over-coated ZrO 2 :Y 2 O 3 /SiO 2 mirror coatings at 1064nm were fabricated by E-beam evaporation (EBE). The absorbance of the samples before and after laser conditioning was measured by surface thermal lensing (STL) technology and the defects density was detected under Nomarski microscope. The enhancement of the laser damage resistance was found after laser conditioning. The dependence of the laser conditioning on the coating design was also observed and the over-coated sample obtained greatest enhancement, whereas the absorbance of the samples did not change obviously.

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Section: Introductionmentioning

confidence: 99%

<title>Laser conditioning of dielectric oxide mirror coatings at 1064 nm</title>

et al. 2004

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“…Heat treatment, laser conditioning [7] and oxygen ion posttreatment [8] are all effective techniques for modifying film properties. Heat treatment is the most popular post-treat technique, because it can be easily operated by annealing in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…Heat treatment is the most popular post-treat technique, because it can be easily operated by annealing in the atmosphere. Laser conditioning has been proved to be very effective [7], involving the scanning of the sample by a laser beam with energy at fluence levels below the LIDT. Ion posttreatment is a new technique following the development of ion beam technology, and can improve the characteristics and increase the quality of the coating by bombarding the coating after deposition with an ion beam of certain energy [8].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the influence of different post-treatment methods on the properties of HfO2 single layers

Wang

Jin

Zhang

et al. 2009

Optics & Laser Technology

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“…Though it is now admitted that nano-centers or precursors are at the origin of low damage threshold in optical coatings and substrates, 1-10 little progress has been observed in the last few years, in spite of laser conditioning processes [11][12][13][14][15][16][17][18][19][20][21][22][23] for specific materials, and sophisticated vacuum deposition technologies. [24][25][26] This situation is surely the result of a lack of characterization due to the very low density of defects 9,27 and the lack of sensitivity or detectivity in the characterization techniques.…”

Section: Introductionmentioning

confidence: 99%

Method for the optical measurement of size and complex index of laser damage precursors in optical components

et al. 2004

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Laser damage in optical components is caused mainly by the presence of sub-micronic defects, inherent to the manufacturing process (metal or dielectric inclusions, fractures, bubbles). An improvement of the laser damage threshold requires an analysis of damage process and an identification of the laser damage precursors. However, the assumed nanometer size of such precursors makes their identification difficult by the usual optical methods. In this paper, we present a method to obtain the size and complex index of laser damage precursors in thin films or substrates. This method is based on the knowledge of three parameters accessible to measurements, which are the precursor density, the laser damage threshold and the precursor absorption. Density and threshold are extracted from the fit of laser damage probability curves with the use of a statistic model and absorption is obtained with photothermal measurements. From these measurements, an electromagnetic and thermal model permits to obtain an estimation of both complex index and size of the laser damage precursors. The different experimental and theoretical tools are described in this paper : laser damage testing apparatus, photothermal bench, stochastic model for the interpretation of laser damage probability curves, electromagnetic and thermal model. An application example is given : we present our first results in silica thins films where sub-micronic laser damage initiators at 1064nm have been highlighted and identified with our method.

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Temporary laser damage threshold enhancement by laser conditioning of antireflection-coated glass

Cited by 27 publications

References 3 publications

<title>Laser conditioning of dielectric oxide mirror coatings at 1064 nm</title>

<title>Laser conditioning of dielectric oxide mirror coatings at 1064 nm</title>

A comparative study of the influence of different post-treatment methods on the properties of HfO2 single layers

Method for the optical measurement of size and complex index of laser damage precursors in optical components

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