Broadband Er3+-Yb3+ co-doped superfluorescent fiber source

In this paper, extensive experimental results on broad-band double cladding Er3+-Yb3+ co-doped superfluorescent fiber sources (SFSs), characterizing their output power, mean wavelength, and bandwidth (BW) stability with variations of pump power, pump wavelength, and fiber temperature, have been reported. For a 55-cm fiber, SFS power from 3.7755 (maximum BW condition of more than 80 nm) to 9.1837 mW (maximum power condition, BW is about 34 nm) has been achieved. The SFS mean wavelength dependence on pump wavelength is highly pump temperature sensitive, and can be reduced to zero in a chosen pump temperature field. The intrinsic variation of the SFS mean wavelength λm with fiber temperature is also measured, and a linear variation from 15 to 45 °C with a slop of −0.053 nm/°C for Lf = 100 cm and −0.04 nm/°C for Lf = 55 cm is found.