Time-bin entangled photon pairs from spontaneous parametric down-conversion pumped by a cw multi-mode diode laser
Time-bin entangled photon pairs from spontaneous parametric down-conversion pumped by a cw multi-mode diode laser
复制标题
由连续波多模二极管激光器泵浦的自发参量下转换产生的时间段纠缠光子对
DOI：
10.1117/12.2078982
复制
发表时间：
2013
影响因子：
2.9
通讯作者：
Yoon
中科院分区：
文献类型：
--
作者：
O. Kwon;Kwang;Y. Ra;Yong;Yoon
Franson干涉仪由两个空间分离的非平衡Mach-Zehnder干涉仪组成，信号和自发参量下转换（SPDC）产生的空闲光子通过这两个干涉仪进行传输。它通常用于制备窄带和双脉冲两种SPDC抽运模式下的两个光子的时间阱纠缠。在窄带状态下，SPDC过程由相干长度远长于Franson干涉仪程长差的窄带连续波激光器泵浦。在双脉冲状态下，脉冲对之间的纵向距离等于弗朗森干涉仪的路径长度差。在本文中，我们提出了另一种可能产生时间仓纠缠的状态，并对该方案进行了实验证明。
The Franson interferometer consists of two spatially separated unbalanced Mach-Zehnder interferometers through which the signal and the idler photons from spontaneous parametric down-conversion (SPDC) are made to transmit. It is often used to prepare time-bin entanglement of two photons in the two SPDC pumping regimes: the narrowband regime and the double-pulse regime. In the narrowband regime, the SPDC process is pumped by a narrowband cw laser with the coherence length much longer than the path length difference of the Franson interferometer. In the double-pulse regime, the longitudinal separation between the pulse pair is made equal to the path length difference of the Franson interferometer. In this paper, we propose another regime by which the generation of time-bin entanglement is possible and demonstrate the scheme experimentally.