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报道了一种基于大模场光纤级联放大的全光纤高峰值功率纳秒脉冲产生系统。将单模光纤前端系统输出的10ns、100nJ任意整形脉冲输入由芯径15、30、140μm的掺镱大模场光纤级联构成的光纤放大器放大,获得了能量3.2mJ、峰值功率0.3MW的整形纳秒脉冲。研究了该光纤系统极限输出能力,在高斯脉冲注入的情况下实现了光纤系统10ns/7.2mJ/0.7MW高能量和1.16ns/3.7mJ/3.2MW高峰值功率输出。
An all-fiber high-peak-power nanosecond pulse generation system based on the large mode field fiber cascade amplification is reported. The single-mode fiber front-end system output 10ns, 100nJ arbitrary shaping pulse input by the core diameter 15,30,140μm Ytterbium-doped large-mode fiber cascaded optical amplifier composed of fiber amplifier, obtained energy 3.2mJ, peak power 0.3MW plastic Nanosecond pulse. The limit output capability of the optical fiber system was studied. High power of 10ns / 7.2mJ / 0.7MW and high peak power of 1.16ns / 3.7mJ / 3.2MW were achieved with Gaussian pulse injection.