Low-loss coupling between two single-mode optical fibers with different mode-field diameters using a graded-index multimode optical fiber.

Abstract

We present a method for ultra-low-loss coupling between two single-mode optical fibers with different mode-field diameters using multimode interference in a graded-index multimode optical fiber. We perform a detailed analysis of the interference effects and show that the graded-index fiber can also be used as a beam expander or condenser. The results are… (More)
DOI: 10.1364/OL.36.003596

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