Influence of pumping laser bandwidth on the quantum fluctuation chracteristic of non-degenerate optical parametric amplifier

Usually the quantum fluctuation characteristic of the non-degenerate optical parametric amplifier is analysed under the assumption of monochromatic pumping. However, in experiments, the driving beam with finite bandwidth is used to obtain the non-degenerate signal and idler beam amplifications. On account of that, we derive an analytical solution for the non-degenerate optical parametric amplification system with finite bandwidth laser pumping, and evaluate the associated quantum fluctuation. Finally, the application of the V₁ criterion to the bipartite entanglement is discussed.     

Influence of pumping laser bandwidth on the quantum fluctuation chracteristic of a non-degenerate optical parametric amplifier

Usually the quantum fluctuation characteristic of a non-degenerate optical parametric amplifier is analysed under the assumption of monochromatic pumping. However, in experiments, a driving beam with finite bandwidth is used to obtain the non-degenerate signal and idler beam amplifications. On account of that, we derive an analytical solution for the non-degenerate optical parametric amplification system with finite bandwidth laser pumping, and evaluate the associated quantum fluctuation. Finally, the application of the V1 criterion to bipartite entanglement is discussed.     

无需待测化合物标准样品便可测定校正因子

根据色谱峰面积、校正因子和待测组分含量的关系,应用Ｌｅｖｅｎｂｅｒｇ－Ｍａｒｑｕａｒｄｔ方法对气相色谱分析数据进行最优化计算,可在缺乏待测组分标准样品的条件下测定相应的校正因子。分别测定了甲苯－氯苯、二乙氧基甲烷－乙酸乙酯和二乙氧基甲烷－乙醇－水等３个体系中各组分的相对校正因子。结果表明：化合物校正因子的测定值与相应文献值的相对偏差小于３％。根据实验结果进一步讨论了方法的适用范围以及进行测定所需样品的数目。