Versatile design for temporal shape control of high-power nanosecond pulsed fiber laser amplifier

This research proposed a novel pulse -shaping design for directly shaping distorted pulses after the amplification. Based on the principle of the design we made a pulse shaper. With this pulse shaper, we successfully manipulate the pulse's leading edge and width to achieve an 'M' -shaped waveform in an amplification system. Comparative experiments were conducted within this system to compare the output with and without the integration of the pulse shaper. The results show a significant suppression of the nonlinear effect upon adding the pulse shaper. This flexible and effective pulse shaper can be easily integrated into a high -power all -fiber system, supplying the capability to realize the desired output waveform and enhance the spectral quality. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement