Erbium 3 Fiber lasers 2 Fibers 2 Four wave mixing 2 Nonlinear medium 2 Optical switches 2 Semiconductor optical amplifiers 2 Wavelength 2 Wavelength conversion 2 Wavelength converter 2 1550 nm 1 Absorption rates 1 Arrayed waveguide gratings 1 Average power 1 Bismuth 1 Brillouin 1 Brillouin fiber laser 1 Brillouin pump 1 Broadband amplifiers 1 Chemical vapor deposition 1 Co-doped 1 Continuous Wave 1 Conversion efficiency 1 Degenerate four wave mixing 1 Dopant concentrations 1 Doped fiber 1 Dual-wavelength 1 Dual-wavelength fibre laser 1 Efficiency 1 Erbium ion 1