Effective Raman gain characteristics in germanium- and fluorine-doped optical fibers.
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.
Fukai
Chisato
C
NTT Access Network Service Systems Laboratories, 1-7-1, Hanabatake, Tsukuba, Ibaraki 305-0805, Japan. chisato@ansl.ntt.co.jp
Nakajima
Kazuhide
K
Zhou
Jian
J
Tajima
Katsusuke
K
Kurokawa
Kenji
K
Sankawa
Izumi
I