Comparison of measured and predicted bandwidth of graded-index multimode fibres

Hartog, A.H., Adams, M.J., Sladen, F.M.E., Payne, D.N. and Ankiewicz, A. (1982) Comparison of measured and predicted bandwidth of graded-index multimode fibres. IEEE Journal of Quantum Electronics, 18, (5), 825-838. (doi:10.1109/JQE.1982.1071618).


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Measurements of pulse spreading in three graded index fibers have been performed over an extensive range of wavelengths, including regions in which the index profiles become optimal and the bandwidths correspondingly high. The refractive index distributions and profile dispersion parameter have been measured and used in a ray-tracing algorithm in order to predict bandwidths. Comparison reveals that averaging processes on the index data are usually necessary to account for noncircularity of the fiber and small variations in the deduced profile caused by the wavelength dependence of the near-field intensity distribution. Results obtained by this means usually tend to slightly underestimate the true fiber bandwidth, while alpha-profile predictions always result in overestimates by about one order of magnitude. Remaining discrepancies between measured and predicted bandwidths are attributed to small variations of the index profiles along the fiber length.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1109/JQE.1982.1071618
ISSNs: 0018-9197 (print)
Related URLs:
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QC Physics
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 78642
Accepted Date and Publication Date:
Date Deposited: 11 Mar 2010
Last Modified: 31 Mar 2016 13:13

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