论文标题
低泵能量的参数下转换中的泵耗尽
Pump depletion in parametric down-conversion with low pump energies
论文作者
论文摘要
我们报告了高增益参数下转换的有效产生，包括泵耗尽，泵功率低至100 $μ$ W（Energies $ 0.1 $〜$μ$ J/脉冲）和最高33 \％的转换效率。在我们的简单配置中，将泵梁紧密地聚焦于散装的定期螺旋锂硝酸锂晶体，放置在自由空间中。我们还观察到随着泵的功率增加以达到耗尽的泵种状态，泵和向下转换的光束的光子数统计数据都发生了变化。实验结果是在高效的参数下转换源中泵和下转换梁之间相互作用的明确标志。
We report the efficient generation of high-gain parametric down-conversion, including pump depletion, with pump powers as low as 100 $μ$W (energies $0.1$~$μ$J/pulse) and conversion efficiencies up to 33\%. In our simple configuration, the pump beam is tightly focused into a bulk periodically poled lithium niobate crystal placed in free space. We also observe a change in the photon number statistics for both the pump and down-converted beams as the pump power increases to reach the depleted pump regime. The experimental results are a clear signature of the interplay between the pump and the down-converted beams in highly efficient parametric down-conversion sources.
