THE FOURTH-ORDER INTERFERENCE BETWEEN TWO INDEPENDENT SQUEEZED FIELDS
ZHANG JUN-XIANG, Lingxiang He, Tiancai Zhang, Changde Xie, Kunchi Peng, 山西大学光电研究所,030006 · Acta Physica Sinica · 1999
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 thres-old, the squeezing decreases while the correlation between them increases.