中国物理B ›› 2011, Vol. 20 ›› Issue (2): 24202-024202.doi: 10.1088/1674-1056/20/2/024202
杨剑1, 赵天明1, 张涵1, 杨涛1, 潘建伟1, 包小辉2
Yang Jian(杨剑)a), Zhao Tian-Ming(赵天明) a), Zhang Han(张涵)a), Yang Tao(杨涛)a), Bao Xiao-Hui(包小辉) a)b)†, and Pan Jian-Wei(潘建伟)a)
摘要: In this paper, we report an interesting phenomenon when precisely adjust the tuning crystal for double-resonance of a type-II configured parametric amplifier cavity, which is later verified as a cavity-enhanced effect in optics alignment. The theoretical result indicates that an angle accuracy error within 0.09o is necessary to achieve a high contrast ratio of 100:1 for a cavity with a finesse of about 205, which is crucial but high-demanding to get a high-quality narrowband entanglement source. Meanwhile, we figure out a method to release such a high requirement and get high visibility in a moderate-accuracy alignment.
中图分类号: (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)