Uncoupled 6-core Fibers with a Standard 125-μm Cladding, ITU-T G.652 Optical Properties, and Low XT. - Kazunori Mukasa; Takeshi Takagi; Takaaki Shishikura; Katsuhisa Maruyma; Hajime Oshio; Aditi Mehta; Karsten Rottwitt; Toshio Morioka (OFC, 2023)