To assess the penalty due to nonlinear effect in C+L band long-haul optical amplified transmission link, a new parameter of modified nonlinear phase shift (\phi_(D) is proposed, which is the accumulated nonlinear phase shift weighted by a normalized group velocity dispersion (GVD). Based on the numerical simulation result of broadband long-haul hybrid Raman/erbium-doped fiber amplified transmission line, it is validated that \phi_(D) is more reasonable and suitable than the previous proposed nonlinear phase shift (\phi_(NL) for broadband applications.
© 2008 Chinese Optics Letters
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(190.0190) Nonlinear optics : Nonlinear optics
(250.4480) Optoelectronics : Optical amplifiers
Xue Feng and Xiaoming Liu, "Weighted nonlinear phase shift with group velocity dispersion to assess the nonlinear penalty in C+L band long-haul fiber optical amplified transmission link," Chin. Opt. Lett. 6, 483-486 (2008)