Keller G, D'Auria V, Treps N, Coudreau T, Laurat J, Fabre C
Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure, CNRS, Case 74, 4 place Jussieu, 75252 Paris Cedex 05, France.
Opt Express. 2008 Jun 23;16(13):9351-6. doi: 10.1364/oe.16.009351.
We report the first experimental observation of bright EPR beams produced by a type-II optical parametric oscillator operating above threshold at frequency degeneracy. The degenerate operation is obtained by introducing a birefringent plate inside the cavity resulting in phase locking. After filtering the pump noise, which plays a critical role, continuous-variable EPR correlations between the orthogonally polarized signal and idler beams are demonstrated.
我们报告了首次通过在频率简并条件下高于阈值运行的II型光学参量振荡器产生明亮EPR光束的实验观测结果。通过在腔内引入双折射板实现相位锁定从而获得简并运行。在滤除起关键作用的泵浦噪声后，证明了正交偏振信号光和闲频光之间的连续变量EPR关联。
