高功率LDA紧密环绕抽运Nd:YLF放大器实验研究
Experiment research of Nd:YLF laser amplifier tightly ring-pumped by high power LD array
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摘要: 采用高功率LDA紧密环绕抽运10mm×10mm Nd:YLF和两级双程离轴行波放大结构，实现了对5mm×5mm口径激光的放大。分析并实验研究了在不同抽运电流及不同抽运延时条件下，激光放大器及两级双程离轴放大系统小信号增益的规律。实验得到两级双程放大系统的小信号净增益可达600。Abstract: The 5mm×5mm laser pulse is amplified using 10mm×10mm Nd:YLF laser amplifier tightly ring-pumped by high power LDA and two-stage double-pass abaxial travelling wave amplifying structure. The rules of gain of laser amplifier and amplifying system with pump current and pump delay are studied by simulation and experiment. The two-stage double-pass abaxial small-signal net gain of amplifying system is 600 in experiment, and the energy extract efficiency is 0.86%. The results of experiment and simulation indicate that the structure of the amplifier and amplifying system has high energy extract efficiency and gain, low coupling loss, the advantages of being compact and simple and so on.
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