Time-bin-modulated biphotons from cavity-enhanced down-conversion
Time-bin-modulated biphotons from cavity-enhanced down-conversion
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DOI：
10.1103/physrevlett.97.223601
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发表时间：
2006-12-01
影响因子：
8.6
通讯作者：
Shapiro, Jeffrey H.
中科院分区：
文献类型：
--
作者：
Kuklewicz, Christopher E.;Wong, Franco N. C.;Shapiro, Jeffrey H.
通过腔增强下转换，在二类位相匹配的周期极化KTiOPO4晶体中产生了一种新型的双光子态。通过引入微弱的腔内双折射，我们得到了信号光子和闲置光子，根据它们的到达时间差，它们的量子干涉被调制在单态和三态特征之间。这种腔增强型双光子源光谱明亮，单模光纤耦合符合率为每兆瓦抽运功率每兆赫下转换带宽0.7对/S。
We have generated a new type of biphoton state by cavity-enhanced down-conversion in a type-II phase-matched, periodically poled KTiOPO4 crystal. By introducing a weak intracavity birefringence, we obtained signal and idler photons whose quantum interference was modulated between singlet and triplet signatures according to their arrival-time difference. This cavity-enhanced biphoton source is spectrally bright, yielding a single-mode fiber-coupled coincidence rate of 0.7 pairs/s per mW of pump power per MHz of down-conversion bandwidth.