Open AccessDynamic properties of single pump, dispersion-compensating Raman/EDFA hybrid amplifier recycling residual Raman pump
Author(s) -
Ju Han Lee,
Young Eun Chang,
YoungGeun Han,
Sang Hyuck Kim,
Sang Bae Lee
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.006594
Subject(s) - optical amplifier , materials science , optics , amplifier , dispersion (optics) , raman scattering , raman spectroscopy , raman amplification , optoelectronics , physics , laser , cmos
We experimentally investigate transient effects of our proposed single pump, dispersion-compensating Raman/EDFA hybrid amplifier recycling residual Raman pump in a cascaded EDF under the situation of multi-channel add/drop, and then demonstrate the use of a FBG based all-optical gain-clamping technique to efficiently suppress the output transients. The results show that the proposed hybrid amplifier has a significantly long transient response time of ~ 2 ms compared to the previous reported value of the conventional separate pump, Raman/EDFA hybrid amplifiers due to both the low-pumping regime operation of 14XX nm pumped EDFA section and the additional pump transit time through the 12.6 km long dispersion compensating fiber to reach the EDF. However, using a simple gain-clamping method we obtain an almost, transient-free operation.