Imperial College London
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ProfessorDarrenCrowdy

Faculty of Natural Sciences, Department of Mathematics

Professor in Applied Mathematics
 
 
 
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Contact

 

+44 (0)20 7594 8587d.crowdy Website

 
 
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Location

 

735Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Chen:2021:10.1364/OME.419607,
author = {Chen, M and Stokes, Y and Crowdy, D and Buchak, P and Foo, H and Dowler, A and Ebendorff-Heidepriem, H},
doi = {10.1364/OME.419607},
journal = {Optical Materials Express},
pages = {905--912},
title = {Investigation of oversized channels in tubular fibre drawing},
url = {http://dx.doi.org/10.1364/OME.419607},
volume = {11},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In a previous study, we compared experiments on drawing of axisymmetric tubular optical fibres to a mathematical model of this process. The model and experiments generally agreed closely. However, for some preforms and operational conditions, the internal channel of the drawn fibre was larger than predicted by the model. We have further investigated this phenomenon of an oversized channel with to determine the mechanism behind the size discrepancy. In particular we have explored the possibility of channel expansion similar to ‘self-pressurisation’ in fibres drawn from preforms that have been first sealed to the atmosphere, as previously described by Voyce et al. [J. Lightwave Technol. 27, 871 (2009) [CrossRef]  ]. For this, two pieces from each of two preforms with different inner to outer diameter ratios were drawn to fibre, one open to the atmosphere and the other with a sealed end. In addition, we have sectioned a cooled neck-down region from a previous experiment, for which the fibre had an oversized channel compared to the model prediction, and measured the cross-sectional slices. We here compare this new experimental data with the predictions of the previously derived model for drawing of an unsealed preform and a new model, developed herein, for drawing of a sealed tube. We establish that the observed oversized channels are not consistent with the self-pressurisation model for the sealed tube.
AU  - Chen,M
AU  - Stokes,Y
AU  - Crowdy,D
AU  - Buchak,P
AU  - Foo,H
AU  - Dowler,A
AU  - Ebendorff-Heidepriem,H
DO  - 10.1364/OME.419607
EP  - 912
PY  - 2021///
SN  - 2159-3930
SP  - 905
TI  - Investigation of oversized channels in tubular fibre drawing
T2  - Optical Materials Express
UR  - http://dx.doi.org/10.1364/OME.419607
UR  - http://hdl.handle.net/10044/1/88204
VL  - 11
ER  -
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