An assessment of the spatial-filtering technique for the measurement of refractive-index profiles in optical fibre preforms


Sasaki, I. and Payne, D.N. (1981) An assessment of the spatial-filtering technique for the measurement of refractive-index profiles in optical fibre preforms. In, IEE Colloquium on Test Equipment for Optical Fibre Communication Systems, London, GB,

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Description/Abstract

The performance of optical transmission systems is strongly dependent on the details of the fibre refractive-index profile. In previous papers we have shown that non-destructive measurements performed on both single-mode and multimode fibre preforms a spatial filtering technique can reveal the index profile with remarkable accuracy and resolution. The method involves imaging of the transversely-illuminated preform by means of a high-quality lens and modulating the transmitted light in the lens focal plane with any of a number of types of spatial filter. With the aid of a small photodetector placed in the image plane it is possible to isolate individual rays in turn and to determine their deflection as they traverse the preform. The index profile is reconstructed from this deflection data by performing an integral transform

Item Type: Conference or Workshop Item (Paper)
Additional Information: Digest no. 1981/51
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 77713
Date Deposited: 11 Mar 2010
Last Modified: 27 Mar 2014 18:57
URI: http://eprints.soton.ac.uk/id/eprint/77713

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