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进行了激光二极管侧抽运Nd∶YLF多程放大实验研究。设计了高增益的激光二极管侧抽运Nd∶YLF放大腔,通过对放大器的优化设计避免了自激的出现。放大器工作波长为1053nm,工作物质为c轴Nd∶YLF,重复频率1Hz,采用单个放大腔四程放大的光路结构,放大腔总抽运功率为1.8kW,激光二极管的中心波长为797nm,放大腔中激光二极管采用环状密耦合的方式,实现了高效抽运。种子激光能量为0.1μJ,脉宽为7.5ns,M2≤1.1,稳定性为±8%。放大器输出能量为2.9mJ,脉宽为6.7ns,M2平均为1.65,稳定性为±6.9%,总增益为2.9×104倍。
A laser diode-pumped Nd:YLF multi-path amplification experiment was carried out. The design of high gain laser diode side pumped Nd:YLF amplifier cavity, through the optimal design of the amplifier to avoid the emergence of self-excited. Amplifier operating wavelength of 1053nm, the working substance of the c-axis Nd: YLF, repetition rate of 1Hz, using a single amplifier cavity four-way optical amplifier structure, the total cavity pumping power of 1.8kW, the laser diode center wavelength of 797nm, amplification cavity The laser diode in the ring close-coupled manner, to achieve efficient pumping. Seed laser energy of 0.1μJ, pulse width of 7.5ns, M2 ≤ 1.1, the stability of ± 8%. Amplifier output energy of 2.9mJ, pulse width of 6.7ns, M2 average of 1.65, the stability of ± 6.9%, the total gain of 2.9 × 104 times.