Open AccessComposite broad-band fiber Raman amplifiers using incoherent pumping
Author(s) -
Bing Han,
Xiupu Zhang,
Guodong Zhang,
Zhenguo Lü,
Guangxue Yang
Publication year - 2005
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.006023
Subject(s) - optics , raman amplification , optical amplifier , flatness (cosmology) , amplifier , raman spectroscopy , materials science , ripple , optical fiber , amplified spontaneous emission , bandwidth (computing) , optoelectronics , physics , raman scattering , telecommunications , laser , computer science , cosmology , cmos , quantum mechanics , voltage
This report presents an investigation of composite fiber Raman amplifiers (i.e., a distributed fiber Raman amplifier followed by a discrete fiber Raman amplifier) with in-coherent pumping, compared to conventional coherent pumping. It is shown that a flatter gain, noise figure and optical signal-to-noise ratio (OSNR) over 100-nm bandwidth can be achieved simultaneously by using two counter-incoherent pumps, compared to using six counter-coherent pumps. Moreover, it is found that a further improvement in gain, noise figure and OSNR flatness can be obtained in composite fiber Raman amplifiers with bi-directional incoherent pumping. The flatness of both gain and OSNR with a ripple of 1 dB is predicted by using one co-incoherent pump and one counter-incoherent pump.