压缩态光场的四阶量子干涉

THE FOURTH ORDER INTERFERENCE BETWEEN TWO INDEPENDENT SQUEEZED FIELDS

采用半经典理论讨论了同一抽运源抽运的两个独立光学参量振荡腔（ＯＰＯ）所产生的压缩态光场的四阶量子干涉效应．结果表明：在ＯＰＯ振荡阈值处，输出光场压缩度最高但四阶量子干涉最弱，条纹可见度为３３３％。

Abstract The fourth order quantum interference of squeezed fields generated by two independent optical parametric oscillators(OPOs) is discussed based on the semi classical theory. It is shown that at the oscillation threshold of OPOs the squeezing of two output fields is the highest but the fringe visibility of fourth order interference is the lowest(33.3%). When the pump power is away from the threshold, the squeezing decreases while the correlation between them increases.