Optical Characterisation of Hydroxide Catalysed Bonds Applied to Phosphate Glass

Lacaille, G., Mangano, V., van Veggel, A.-M. A. , Killow, C. J., MacKay, P. E., Rowan, S. and Hough, J. (2017) Optical Characterisation of Hydroxide Catalysed Bonds Applied to Phosphate Glass. In: Optifab 2017, Rochester, NY, USA, 16-19 Oct 2017, p. 1044825. ISBN 9781510613645 (doi: 10.1117/12.2279693)

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Publisher's URL: http://dx.doi.org/10.1117/12.2279693


We apply the Hydroxide Catalysis Bonding (HCB) technique to phosphate glass and measure the reflectivity and Light Induced Damage Threshold (LITD) of the newly formed interface. HCB is a room temperature, high performing process which was designed for astronomical research glass assemblies and played a key role in the detection of gravitational waves, a breakthrough in contemporary science. The bonds have numerous assets including mechanical strength, stability, no outgassing and resistance to contamination which are of high interest in the precision optics industry. However only little research has been done on their optical properties and mostly on silica based materials. In this paper, we use HCB to bond phosphate glass at room temperature with the goal of designing composite components for solid state laser gain media. We change the solution parameters to identify how they influence the final properties of the bonds: the LIDT at 1535 nm in long pulse regime and the reflectivity at 532 nm are investigated. The measurement of the incidence dependent reflectance allows estimating the thickness and refractive index of the bond in a non destructive process. The best performing set of parameters yields a LIDT of 1.6 GW/cm2 (16 J/cm2) and a reflectivity below 0.03 % which makes it suitable for use in high power lasers. The bond thickness is derived both from Scanning Electron Microscopy and the reflectivity measurements and is in the range of 50-150 nm depending on the parameters. Finally, the bonds survive cutting and polishing which is promising for manufacturing purpose.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:van Veggel, Dr Marielle and Killow, Dr Christian and Mangano, Valentina and Rowan, Professor Sheila and Lacaille, Grégoire and Hough, Professor James
Authors: Lacaille, G., Mangano, V., van Veggel, A.-M. A., Killow, C. J., MacKay, P. E., Rowan, S., and Hough, J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Published Online:16 October 2017
Copyright Holders:Copyright © 2017 SPIE
First Published:First published in Proceedings of SPIE 10448: 1044825
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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