We analyze the evolution of beam quality when propagating through a parabolic index (PI) fiber. The deterioration in beam quality is expressed in terms of the fiber parameters, and a methodology for minimizing the deterioration is presented. The fiber optimization procedure is evaluated numerically for an application where the PI fiber is used to deliver the signal produced by a tapered fiber-bundle beam combiner. It was demonstrated that delivery with no beam quality deterioration can be achieved with proper fiber design.
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ErrataRoey Zuitlin, Yariv Shamir, Yoav Sintov, and Mark Shtaif, "Modeling the evolution of spatial beam parameters in parabolic index fibers: erratum," Opt. Lett. 38, 1067-1067 (2013)