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Fiber spot size: a simple method of calculation

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3 Author(s)
Galawa, R.L. ; Electromagn. Technol. Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA ; Goyal, I.C. ; Ghatak, A.K.

The ability to integrate the Laguerre-Gauss functions in closed form is exploited to allow a simple but accurate evaluation of single-mode fiber spot size using Galerkin's method. The method avoids the need for numerical integration in a broad class of refractive-index profiles. Its simplicity depends on the use of a pattern-matching algorithm to avoid the numerical integration normally called for. The algorithm is very fast and gives exact results. The development of symbolic computer languages makes this approach especially easy. A symbolic program was used to predict the spot size and the far-field radiation pattern, and the results are compared with the exact values, getting excellent results

Published in:

Lightwave Technology, Journal of  (Volume:11 ,  Issue: 2 )

Date of Publication:

Feb 1993

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