Time-evolution of NIR absorption in hydroxide-catalysis bonds

Martin, I. W. , Steinlechner, J., van Veggel, A.-M. A. , Tornasi, Z., Bell, A. S. , Hough, J. and Rowan, S. (2019) Time-evolution of NIR absorption in hydroxide-catalysis bonds. Materialia, 6, 100331. (doi: 10.1016/j.mtla.2019.100331)

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Hydroxide-catalysis bonding is a powerful precision jointing technique. It is used to construct opto-mechanical systems, e.g. in gravitational-wave detectors or satellite-based telescopes, and for optical applications such as high-power laser-crystal assemblies or transmissive optical components. Here we present studies of the optical absorption of such a bond over a period of 38 days after bonding. We find significant absorption at 1550 nm and 2000 nm, while it is negligible at 1064 nm. We show a factor of four reduction in absorption over the observed period, which could increase the tolerable power in transmissive bonded optics. Based on the absorption ratio found at different wavelengths, we conclude that the absorption is most likely dominated by water migrating out of the bond by two mechanisms.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Bell, Dr Angus and Steinlechner, Dr Jessica and Tornasi, Mr Zeno and van Veggel, Dr Marielle and Rowan, Professor Sheila and Martin, Dr Iain and Hough, Professor James
Authors: Martin, I. W., Steinlechner, J., van Veggel, A.-M. A., Tornasi, Z., Bell, A. S., Hough, J., and Rowan, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Materialia
ISSN (Online):2589-1529
Published Online:19 April 2019
Copyright Holders:Copyright © 2019 Acta Materialia Inc.
First Published:First published in Materialia 6:100331
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
591721Optical characterisation of silicon and mirror materials for gravitational astronomy.Iain MartinThe Royal Society (ROYSOC)RG110331S&E P&A - PHYSICS & ASTRONOMY
713723Investigations in gravitational radiationSheila RowanScience & Technology Facilities Council (STFC)ST/N005422/1S&E P&A - PHYSICS & ASTRONOMY
721571Enabling astronomy with gravitational wavesIain MartinThe Royal Society (ROYSOC)UF150694S&E P&A - PHYSICS & ASTRONOMY
599864Underexplored properties of hydroxide catalysis bondsAnna-Maria Van VeggelThe Royal Society (ROYSOC)DH120021S&E P&A - PHYSICS & ASTRONOMY