Erbium 2 Four wave mixing Wavelength 2 Wavelength conversion 2 Wavelength converter 2 1550 nm 1 Arrayed waveguide gratings 1 Bismuth 1 Broadband amplifiers 1 Continuous Wave 1 Conversion efficiency 1 Degenerate four wave mixing 1 Dual-wavelength 1 Dual-wavelength fibre laser 1 Efficiency 1 Erbium-doped fibre lasers 1 Erbium-doped optical amplifier 1 Experimental approaches 1 FWM conversion efficiency 1 Fibers 1 Fibre lasers 1 Four-wave mixing (FWM) 1 High-power 1 Highly non-linear fibres 1 Highly nonlinear fibre (HNLF) 1 Mixing 1 Multiple outputs 1 Nonlinear medium 1 Optical frequency conversion 1 Optical switches 1