Waveguide optics

Comparison of two methods for predicting the bandwidth of multimode graded-index optical fibers

A. L. Tomashuk

General Physics Institute, Russian Academy of Sciences, Moscow

Abstract: Two methods for predicting the bandwidth of multimode graded-index optical fibers are studied. Each method is based on measurements of the profile of the refractive index in the preform. The first method is the α-approximation method. The second method is based on a model of a quasiregular fiber and uses the Petermann equation to calculate the mode delay times. Experiments show that the second of these methods is more accurate by a factor of 3.5.

UDC: 681.7.068

PACS: 42.81.Cn, 42.81.Ht, 07.60.Hv

Received: 15.10.1992

 English version: Quantum Electronics, 1993, 23:1, 64–66

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