Room temperature multi-wavelength erbium-doped fiber ring laser in the C-band is presented. Homogeneous gain broadening of erbium-doped fiber (EDF) is suppressed by adding a frequency shifter in the ring cavity. The multi-wavelength operation is demonstrated both theoretically and experimentally. High-power and extremely flat multi-wavelength output is achieved by optimizing the total laser cavity loss, pump power and fiber length, filters and concentration of the EDF.
An erbium-doped fiber laser with high-power and CW uniform multi-wavelength output was reported. More than 20 laser wavelengths were achieved at room temperature by using a frequency periodic filter and frequency shifter. The output spectral becomes flat after optimizing the laser cavity, the pump power and the length of active fiber. Low threshold and high slope efficiency were realized by the introduction of linear cavity.
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