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Updated: May 29, 2026
Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Low-loss coupling between two single-mode optical fibers with different mode-field diameters using a graded-index
Arash Mafi1, Peter Hofmann, Clémence Jollivet Salvin
1Department of Electrical Engineering & Computer Science, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA. mafi@uwm.edu
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 important for devices in which optical fibers with different mode-field diameters are coupled in series, such as in ultra-short-pulse fiber ring lasers, or in optical fiber communication links.
