title: Effective Raman gain characteristics in germanium- and fluorine-doped optical fibers.
abstract: We describe the dopant dependence of Raman gain in germanium- and fluorine-doped optical fibers. We clarify, both theoretically and experimentally, the effective Raman gain characteristic in an optical fiber, which is closely related to the fiber's refractive-index profile and electromagnetic field profile. We also show that this experimentally determined relationship can be used to evaluate the effective Raman gain characteristic in a germaninum- or a fluorine-doped optical fiber with an arbitrary index profile.
authors.affiliation: NTT Access Network Service Systems Laboratories, 1-7-1, Hanabatake, Tsukuba, Ibaraki 305-0805, Japan. chisato@ansl.ntt.co.jp
authors.forename: Chisato
authors.initials: C
authors.lastname: Fukai
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Nakajima
authors.forename: Jian
authors.initials: J
authors.lastname: Zhou
authors.forename: Katsusuke
authors.initials: K
authors.lastname: Tajima
authors.forename: Kenji
authors.initials: K
authors.lastname: Kurokawa
authors.forename: Izumi
authors.initials: I
authors.lastname: Sankawa