Virginia TechHattori, Haroldo TakashiSafaai-Jazi, Ahmad2014-04-042014-04-041998-09-01Harold T. Hattori and Ahmad Safaai-Jazi, "Fiber Designs with Significantly Reduced Nonlinearity for Very Long Distance Transmission," Appl. Opt. 37, 3190-3197 (1998). doi: 10.1364/ao.37.0031900003-6935http://hdl.handle.net/10919/46902A class of low-nonlinearity dispersion-shifted fibers based on depressed-core multistep index profiles is investigated. A systematic approach for designing these fibers in which a reference W-index profile is used to initiate the design is presented. Transmission properties, including effective area, mode-field diameter, dispersion, dispersion slope, and cutoff wavelength, are evaluated for several design examples. The effects of varying fiber dimensions and indices on effective area and mode-field diameter are assessed. It is shown that there is a trade-off between these two properties and, generally, larger effective areas are associated with larger mode-field diameters. Dispersion-shifted single-mode fiber designs with effective areas of from 78 to 210 mu m(2) and the corresponding mode-field diameter of from 8.94 to 14.94 mu m, dispersion less than 0.07 ps/nm km, and dispersion slope of approximately 0.05 ps/nm(2) km are presented. (C) 1998 Optical Society of America.application/pdfenIn CopyrightSingle-mode fibersOptical amplifiersDispersionArticle - Refereedhttp://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-15-3190https://doi.org/10.1364/ao.37.003190