Damage threshold study of ion-beam-sputtered coatings for a visible high-repetition laser at LLNL

Stolz, Christopher J.; Taylor, John R.

doi:10.1117/12.147400

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…The measured absorption is approximately 3-5 ppm. This absorption level was much higher than the reported results obtained by IBS and traditional electron beam evaporation [22]. The reason was probably due to the impurities introduced by the energetic ion bombardment [23].…”

Section: Optical Loss Analysis and Reflectivitycontrasting

confidence: 57%

Study on the Properties of 1319 nm Ultra-High Reflector Deposited by Electron Beam Evaporation Assisted by an Energetic RF Ion Source

Deng

Wang

et al. 2018

Coatings

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Ultra-high reflectors, working as a critical optical component, has been widely applied as a cavity mirror in fine optical systems such as laser gyro, F-P interferometer, etc. For decades, ion beam sputtering (IBS) technology, which can deposit ultra-low loss and dense layers, has been commonly believed to be the only and irreplaceable method to fabricate ultra-high reflectors. Thus, reports on other methods are rare and a reflectivity above 99.99% obtained by evaporation technology (including ion assisted evaporation) has not been seen yet. In the present study, an energetic radio frequency (RF) ion source was introduced during the electron beam evaporation process, which improved the layer quality dramatically. An ultra-high reflector at 1319 nm with reflectivity of 99.992% (measured by cavity-ring down method) was successfully deposited on a φ100 mm × 25 mm single crystal silicon substrate whose surface roughness was approximately 0.420 nm. The surface figure of the reflector was accurately controlled superior to 1/6λ (λ = 632.8 nm). The measured absorption was approximately 3-5 ppm and the calculated scatter based on surface roughness measurement was approximately 6.64 ppm. Total loss of the reflector was systematically discussed. This study showed that it is possible to apply electron beam evaporation in ultra-high reflector manufacture and the method is capable of depositing reflectors with an aperture larger than φ600 mm which is the maximum capacity of current IBS technology.

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Section: Optical Loss Analysis and Reflectivitycontrasting

confidence: 57%

Study on the Properties of 1319 nm Ultra-High Reflector Deposited by Electron Beam Evaporation Assisted by an Energetic RF Ion Source

Deng

Wang

et al. 2018

Coatings

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“…scatter and absorption loss, limits the increment of reflectance from adding more pairs and they usually are the major sources for limiting the quality factor (Q) of the optical resonator. Temperature variation in the coatings due to absorption and scattering can cause serious mirror damage in high power application [37] and phase distortion in precision measurement [38]. Optical absorption due to oxygen deficiency in the amorphous heavy metal oxides high index material such as Ta 2 O 5 and TiO 2 , which are the most commonly used high index materials for the visible and near IR wavelength range, is the major source for optical absorption asides from other sources such as impurity absorption.…”

Section: Generalmentioning

confidence: 99%

“…Ring laser gyroscope (RLG) and high power laser systems have set a high level standard on the optical qualities for the dielectric multilayer mirror [37,62]. It provides a good starting for materials selection for the coatings of the laser interference gravitational wave detector.…”

Section: Amorphous Thin Film Materialsmentioning

confidence: 99%

Technology for the next gravitational wave detectors

Mitrofanov

Chao

Pan

et al. 2015

Sci. China Phys. Mech. Astron.

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This paper reviews some of the key enabling technologies for advanced and future laser interferometer gravitational wave detectors, which must combine test masses with the lowest possible optical and acoustic losses, with high stability lasers and various techniques for suppressing noise. Sect. 1 of this paper presents a review of the acoustic properties of test masses. Sect. 2 reviews the technology of the amorphous dielectric coatings which are currently universally used for the mirrors in advanced laser interferometers, but for which lower acoustic loss would be very advantageous. In sect. 3 a new generation of crystalline optical coatings that offer a substantial reduction in thermal noise is reviewed. The optical properties of test masses are reviewed in sect. 4, with special focus on the properties of silicon, an important candidate material for future detectors. Sect. 5 of this paper presents the very low noise, high stability laser technology that underpins all advanced and next generation laser interferometers

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“…Coating design strategies that optimize standing-wave electric field profiles to increase LIDT 13, 22-24 9. Beneficial applications of optical overcoatings 13,21,25,26 10. Application of multilayer dielectric reflectors on meter-scale diffraction gratings 27,28 The list was limited to ten topics to fit within the time constraints of the conference program.…”

Section: Introductionmentioning

confidence: 99%

Front Matter: Volume 7132

Ristau¹,

Soileau²,

Stolz³

2008

Laser-Induced Damage in Optical Materials: 2008

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Publication of record for individual papers is online in the SPIE Digital Library. SPIEDigitalLibrary.orgPaper Numbering: Proceedings of SPIE follow an e-First publication model, with papers published first online and then in print and on CD-ROM. Papers are published as they are submitted and meet publication criteria. A unique, consistent, permanent citation identifier (CID) number is assigned to each article at the time of the first publication. Utilization of CIDs allows articles to be fully citable as soon they are published online, and connects the same identifier to all online, print, and electronic versions of the publication. SPIE uses a six-digit CID article numbering system in which:The first four digits correspond to the SPIE volume number. The last two digits indicate publication order within the volume using a Base 36 numbering system employing both numerals and letters. These two-number sets start with 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B … 0Z, followed by 10-1Z, 20-2Z, etc.The CID number appears on each page of the manuscript. The complete citation is used on the first page, and an abbreviated version on subsequent pages. Numbers in the index correspond to the last two digits of the six-digit CID number.Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/22/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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Damage threshold study of ion-beam-sputtered coatings for a visible high-repetition laser at LLNL

Cited by 6 publications

References 1 publication

Study on the Properties of 1319 nm Ultra-High Reflector Deposited by Electron Beam Evaporation Assisted by an Energetic RF Ion Source

Study on the Properties of 1319 nm Ultra-High Reflector Deposited by Electron Beam Evaporation Assisted by an Energetic RF Ion Source

Technology for the next gravitational wave detectors

Front Matter: Volume 7132

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