In this paper, a novel high-energy mode-locked fiber laser based on the nonlinear polarization rotation (NPR) technique is presented to generate 331 nJ rectangular pulses. When pump power was 2659 mW, the maximum output power would be 102.3 mW; the maximum peak power was 41.74 W under the pump power of 1766 mW. In this study, the use of two homemade laser diodes and other common fiber devices was a vital step to achieve the low-cost and high-efficiency NPR mode-locked fiber laser. Based on these results, a novel approach could be developed to realize a high-energy rectangular pulse and promote the practical applications of the NPR mode-locked fiber laser in the field of ultrafast photonics.
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${\lambda_c}$, the central wavelength; SNR, signal-to-noise ratio; ${\tau_{\max}}$, the maximum pulse duration; $P_{\rm{pump}}$, pump power; $P_{\rm{ave}}$, the average output power; $E_{\rm{pulse}}$, the pulse energy; Ref., reference.
Table 2.
Performance of High-Energy Mode-Locked Fiber Lasers Based on 2D Materialsa
${\lambda_c}$, the central wavelength; SNR, signal-to-noise ratio; ${\tau_{\max}}$, the maximum pulse duration; $P_{\rm{pump}}$, pump power; $P_{\rm{ave}}$, the average output power; $E_{\rm{pulse}}$, the pulse energy; Ref., reference.
Table 2.
Performance of High-Energy Mode-Locked Fiber Lasers Based on 2D Materialsa