Detailed error estimates for first order WKB calculation method |
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| Authors: | Jacobsen G. Ramskov Hansen J.J. |
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| Affiliation: | Technical University of Denmark, Electromagnetics Institute, Lyngby, Denmark; |
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| Abstract: | Using evanescent wave theory combined with nonlinear transformation techniques, very accurate upper and lower limits of the exact results for modal propagation constants and group delays are obtained for a near parabolic graded-index optical fibre. Comparing to a first order WKB solution we find WKB errors in group delays of 3?10 ps/km compared to the exact results, the fundamental mode specifying the worst case. |
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