Title :
Link control protection in cascades of optical Hybrid Amplifiers (EDFA + DFRA)
Author :
Dumas, B. ; Lara, S. ; Olivares, R.
Author_Institution :
Opt. Dept., Ecole Nat. Super. des Telecommun. de Bretagne, Brest, France
Abstract :
In this work the power transient control in cascades of Hybrid Amplifiers (HAs) is investigated. Two hybrid configurations are considered: a backward pumped DFRA preceding an EDFA and a forward pumped DFRA ahead of an EDFA. In both cases the EDFA in forward pumped. When 17 out of 20 channels are dropped/added, the steady state power excursions of the surviving channels were reduced from 4.21dB and 6.25dB to 0.01dB and 0 dB, for a single HA under configurations “EDFA + backward DFRA” and “forward DFRA + EDFA”, respectively. When a cascade of 12 HAs (1800 km) is studied, the steady state output power excursions were drastically mitigated from 8.66dB to 0.07dB and 0.60 dB, for the same hybrid configurations, respectively.
Keywords :
distributed amplifiers; erbium; optical communication equipment; optical control; optical fibre amplifiers; optical fibre communication; optical pumping; stimulated Raman scattering; telecommunication channels; telecommunication control; transient response; wavelength division multiplexing; DFRA; DWDM; EDFA; backward pumping; channel adding; channel dropping; distance 1800 km; forward pumping; link control protection; optical hybrid amplifiers; power transient control; steady state power excursions; Erbium-doped fiber amplifier; Gain; Hybrid power systems; Optical fiber networks; Optical pumping; Steady-state; Transient analysis; DFRAs; EDFAs; HAs; power transients;
Conference_Titel :
Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT), 2012 4th International Congress on
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4673-2016-0
DOI :
10.1109/ICUMT.2012.6459734
