Accurate modal gain control in a multimode erbium doped fiber amplifier incorporating ring doping and a simple LP_01 pump configuration
Kang, Qiongyue, Lim, Ee-Leong, Jung, Yongmin, Sahu, Jayanta K., Poletti, Francesco, Baskiotis, Catherine, Alam, Shaif-ul and Richardson, David J. (2012) Accurate modal gain control in a multimode erbium doped fiber amplifier incorporating ring doping and a simple LP_01 pump configuration. Optics Express, 20, (19), 20835-20843. (doi:10.1364/OE.20.020835).
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We experimentally validate a numerical model to study multimode erbium-doped fiber amplifiers (MM-EDFAs). Using this model, we demonstrate the improved performance achievable in a step index MM-EDFA incorporating a localized erbium doped ring and its potential for Space Division Multiplexed (SDM) transmission. Using a pure LP01 pump beam, which greatly simplifies amplifier construction, accurate modal gain control can be achieved by carefully tuning the thickness of the ring-doped layer in the active fiber and the pump power. In particular, by optimizing the erbium-ring-doped structure and the length of active fiber used, over 20dB gain for both LP01 and LP11 signals with a maximum gain difference of around 2 dB across the C band are predicted for a pure LP01 pump beam delivering 250mW power at 980nm.
|Digital Object Identifier (DOI):||doi:10.1364/OE.20.020835|
|Subjects:||Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre
|Date Deposited:||24 Sep 2012 12:40|
|Last Modified:||27 Mar 2014 20:25|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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