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Non-Destructive Characterization of Porous Soot Boules

Published online by Cambridge University Press:  25 February 2011

Werner J. Glantschnig ,
Albert Holliday  and
Knut D. Pohl
Werner J. Glantschnig
Affiliation:
AT&T Engineering Research Center, P. O. Box 900, Princeton, N. J. 08540
Albert Holliday
Affiliation:
AT&T Engineering Research Center, P. O. Box 900, Princeton, N. J. 08540
Knut D. Pohl
Affiliation:
AT&T Engineering Research Center, P. O. Box 900, Princeton, N. J. 08540
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Abstract

Owing to their opacity to visible light porous soot boules cannot be analyzed by standard optical methods. Yet it would be of considerable help to the preform maker to be able to measure the density and dopant concentration profiles of an unsintered soot boule. This realization prompted the development of a non-destructive soot boule characterization method.

This method amounts to a three step measurement process based on Xray tomography. First the attenuation of a well collimated X-ray beam is measured as it is scanned across the boule perpendicular to the boule axis. Next the linear attenuation coefficient profiles of the boule are reconstructed for a certain number of distinct X-ray energies. Finally, the mass density and dopant concentration profiles of the soot boule are obtained from the attenuation coefficient profiles. Hence, the method reported here allows a fairly complete analysis of the macroscopic structure of a soot boule before sintering.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 88: Symposium P – Optical Fiber Materials and Properties , 1986 , 53
Copyright
Copyright © Materials Research Society 1987

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References

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