2026-10-12T02:07:38Z https://www.scidb.cn/oai

10.57760/sciencedb.31340 2026-03-27T09:00:08Z

2026-03-27 A Hybrid Amplified Nanosecond Pulsed Laser Based on Cascaded SOA Modulation doi:10.57760/sciencedb.31340 en To address the requirements of spatial laser applications for pulse laser sources in terms of temporal flexibility, frequency stability, and system compactness, this paper reports a nanosecond pulsed laser based on a semiconductor-fiber-solid-state hybrid architecture for master oscillator power amplifier (MOPA) operation. Using a 1064 nm distributed feedback (DFB) single-frequency continuous-wave laser as the seed source, a two-stage semiconductor optical amplifier (SOA) is employed to achieve high-extinction-ratio pulse chopping and custom time-domain modulation. By designing the SOA drive current waveform, gain saturation and pulse distortion during the subsequent high-gain amplification process are actively pre-compensated, thereby enhancing the temporal fidelity and consistency of the amplified pulses. At a repetition rate of 1 kHz, ultra-Gaussian pulses with a pulse width of 40 ns were generated via SOA current modulation. After two-stage single-pass fiber amplification, the single-pulse energy of the seed light was increased to 2.1 μJ, with a spectral contrast exceeding 35 dB; Subsequently, energy is further boosted by a two-stage Nd:YVO₄ slab preamplifier and a two-stage Innoslab main amplifier composed of Nd:YVO₄ and Nd:YAG slabs, respectively, ultimately yielding a laser output with a single-pulse energy of 18.5 mJ and a pulse width of 10.6 ns, with a spectral linewidth of approximately 0.03 nm, with a spectral contrast exceeding 30 dB.This study achieves high-energy output while offering high flexibility in controlling pulse width, time-domain waveforms, and repetition rates. The resulting high-energy, high-contrast tunable pulses can serve as an excellent fundamental-frequency source for nonlinear frequency conversion, demonstrating promising prospects for applications such as spatial hyperspectral detection. Hybrid power amplification; Semiconductor optical amplifier; Pulse shaping; Narrow linewidth nanosecond pulses Song Yue Yu Zhenzhen Wang Mingjian Ma Chao Yue Fangxin Chen Xiao Liu Zhengqi Sun Zongrui Hou Xia Chen Weibiao PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank