A single-mode evanescently coupled multicore fiber consisting of 19 hexagonally arranged cores is investigated. Theoretical and experimental results are presented and compared to an equivalent hypothetical step-index fiber. A fundamental mode with an effective area of and a beam propagation factor of 1.02 was measured, showing the high potential of the developed fiber.
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ErrataMoritz M. Vogel, Marwan Abdou-Ahmed, Andreas Voss, and Thomas Graf, "Very-large-mode-area, single-mode multicore fiber: erratum," Opt. Lett. 35, 465-465 (2010)