Abstract
An alternative structure using third-order Raman amplification based on ultralong fiber lasers (UL-FLs) is investigated numerically to further improve the quasi-lossless transmission performance. The performance comparisons on flatness of signal distribution, optical signal–noise ratio (OSNR), and noise figure (NF) among first-order, second-order, and third-order Raman pumping based on UL-FLs are discussed numerically. The results display that the gain distribution is pushed more uniformly along UL-FLs using third-order Raman pumping, which is very useful to further extend the quasi-lossless midspan distance. For transparency transmission, enhanced quasi-lossless transmission could be achieved without sacrifice to OSNR and NF. We also analyze the transmission dynamics of loss-managed fundamental solitons for different pumping configurations. The amplifier span and transmission quality are improved considerably, even for lower dispersion lengths, by employing the proposed scheme.
©2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Yun-Jiang Rao, Xin-Hong Jia, Li Li, and Zeng-Ling Ran
J. Opt. Soc. Am. B 26(7) 1334-1340 (2009)
Juan Diego Ania-Castañón
Opt. Express 12(19) 4372-4377 (2004)
Mercedes Alcón-Camas and Juan Diego Ania-Castañón
Opt. Express 18(23) 23569-23575 (2010)