An assessment of the spatial-filtering technique for the measurement of refractive-index profiles in optical fibre preforms
An assessment of the spatial-filtering technique for the measurement of refractive-index profiles in optical fibre preforms
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.
Sasaki, I.
309a20ae-9f88-4c29-9b85-0c82ef37278b
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
28 May 1981
Sasaki, I.
309a20ae-9f88-4c29-9b85-0c82ef37278b
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
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.
IEE Colloquium on Test Equipment for Optical Fibre Communication Systems, London, United Kingdom.
Record type:
Conference or Workshop Item
(Paper)
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.
More information
Published date: 28 May 1981
Additional Information:
Digest no. 1981/51
Venue - Dates:
IEE Colloquium on Test Equipment for Optical Fibre Communication Systems, London, United Kingdom, 1981-05-28
Identifiers
Local EPrints ID: 77713
URI: http://eprints.soton.ac.uk/id/eprint/77713
PURE UUID: 9966a685-08c6-42d7-b03f-555157883465
Catalogue record
Date deposited: 11 Mar 2010
Last modified: 13 Mar 2024 23:58
Export record
Contributors
Author:
I. Sasaki
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics