High energy square-wave generation from an Er:Yb passive mode-locked fiber ring laser

Based on the dissipative soliton resonance occurring in highly anomalous dispersion regime, we have demonstrated the emission of highly energetic square-wave pulses from the Er:Yb doped double clad fiber laser passively mode-locked through nonlinear polarization evolution. In contrast with the classical soliton regime, when the pumping power increases the pulse broadens and its energy increases, both linearly. Experimental results exhibit a stable mode-locking with single pulse energy as high as 2.27 µJ, a pulse duration of about 200 ns and an average output power of 850 mW.