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Role of core index profile in the performance modeling of polished-type optical fiber couplers

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Abstract

Polished-type optical fiber coupler fabricated using the method of mechanical lapping, with the device side view as shown in Fig. 1(a), has the merit of power splitting tunability.1 The tuning characteristics have been studied in detail with the experimental data being compared with theoretical predictions.1 In the theoretical modeling the single-mode fibers have often been assumed to be of step-core-index distribution for the sake of simplicity. In this paper we show that more realistic core index profile has to be considered in order to better explain the measured power-coupling data.

© 1991 Optical Society of America

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