Few-mode multi-element fiber amplifier for mode division multiplexing.

Authors :: Jain S
Jung Y
May-Smith TC
Alam SU
Sahu JK
Richardson DJ
Source :: Optics express [Opt Express] 2014 Nov 17; Vol. 22 (23), pp. 29031-6.
Publication Year :: 2014
Abstract: We experimentally demonstrate a few-moded cladding-pumped multi-element fiber amplifier, comprising 4 Er/Yb co-doped signal fibers and 1 multimode pump-delivery fiber all of which are drawn together in a common polymer coating, providing a total spatial path multiplicity of 12. An average WDM signal gain of 18.3 dB and differential modal gain of 1.1 dB were achieved in the spectral range of 1542-1560 nm.