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Opt Express. 2011 Aug 15;19(17):16601-11. doi: 10.1364/OE.19.016601.

Multimode fiber amplifier with tunable modal gain using a reconfigurable multimode pump.

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College of Optics & Photonics/CREOL&FPCE, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816-2700, USA.


We propose a method for controlling modal gain in a multimode Erbium-doped fiber amplifier (MM-EDFA) by tuning the mode content of a multimode pump. By adjusting the powers and orientation of input pump modes, modal dependent gain can be tuned over a large dynamic range. Performance impacts due to excitation of undesired pump modes, mode coupling and macro-bending loss within the erbium-doped fiber are also investigated. The MM-EDFA may potentially be a key element for long haul mode-division multiplexed transmission.

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