title: A large effective area multi-core fiber with an optimized cladding thickness.
abstract: The cladding thickness of trench-assisted multi-core fibers was theoretically and experimentally investigated in terms of excess losses of outer cores. No significant micro-bending loss increase was observed on multi-core fibers with the cladding thickness of about 30 µm. The tolerance for the micro-bending loss of a multi-core fiber is larger than that of the single core fiber. However, the cladding thickness will be limited by the occurrence of the excess loss on outer cores. The reduction of cladding thickness is probably limited around 40 µm in terms of the excess loss. The multi-core fiber with an effective area of 110 µm(2) at 1.55 µm and 181-µm cladding diameter was realized without any excess loss.
authors.affiliation: Optics and Electronics Laboratory, Fujikura Ltd. 1440, Mutsuzaki, Sakura, Chiba, 285-8550, Japan. katsuhiro.takenaga@jp.fujikura.com
authors.forename: Katsuhiro
authors.initials: K
authors.lastname: Takenaga
authors.forename: Yoko
authors.initials: Y
authors.lastname: Arakawa
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Sasaki
authors.forename: Shoji
authors.initials: S
authors.lastname: Tanigawa
authors.forename: Shoichiro
authors.initials: S
authors.lastname: Matsuo
authors.forename: Kunimasa
authors.initials: K
authors.lastname: Saitoh
authors.forename: Masanori
authors.initials: M
authors.lastname: Koshiba