Effect of Lossy Cladding on Modal Dispersion Characteristics of Parabolic-Index Fiber

The influence of the cladding on the modal dispersion characteristics of a multimode fiber has been studied for the special case of a Iossless fiber. In this paper, we consider a multimode fiber with a lossy cladding and explain the influence of the cladding loss on the modal dispersion characteristics of the fiber. We adopt a standard deviation of group delay of guided modes to estimate the modal dispersion behavior of the fiber. We conclude that a lossy cladding improves the modal dispersion characteristics in the case of the parabolic-index fiber.