Title :
Reconfigurable Modal Gain Control of a Few-Mode EDFA Supporting Six Spatial Modes
Author :
Yongmin Jung ; Qiongyue Kang ; Sahu, Jayanta Kumar ; Corbett, Brian ; O´Callagham, James ; Poletti, Francesco ; Alam, Shaif-Ul ; Richardson, David J.
Author_Institution :
Optoelectron. Res. Centre, Univ. of Southampton, Southampton, UK
Abstract :
We experimentally demonstrate an inline few-mode erbium doped fiber amplifier supporting six spatial modes with reconfigurable differential gain control and excellent gain flatness obtained through mode-selective bidirectional pumping of a custom fiber with a radially profiled erbium dopant distribution. A signal gain of >20 dB was obtained for all the guided modes with a differential modal gain <;2 dB and good gain flatness across the C-band.
Keywords :
erbium; gain control; laser beams; laser modes; optical fibre amplifiers; optical pumping; few-mode EDFA; gain flatness; inline few-mode erbium doped fiber amplifier; mode-selective bidirectional pumping; radially profiled erbium dopant distribution; reconfigurable differential gain control; reconfigurable modal gain control; spatial modes; Bidirectional control; Erbium; Gain; Multiplexing; Optical fiber amplifiers; Optimized production technology; Mode division multiplexing (MDM); erbium doped fiber amplifier (EDFA); optical fiber communication;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2315500
