Fig. 3

Pump power and absorbed power distribution along 1 m of 4-core fiber under pumping with (a) 808 nm, (b) 980 nm and for 11-core fiber under pumping with (c) 808 nm and (d) 980 nm.

Pump power and absorbed power distribution along 1 m of 4-core fiber under pumping with (a) 808 nm, (b) 980 nm and for 11-core fiber under pumping with (c) 808 nm and (d) 980 nm.