Passive optical switching of photon pairs using a spontaneous parametric fiber loop.
Passive optical switching of photon pairs using a spontaneous parametric fiber loop.
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DOI：
10.1364/ol.37.001220
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发表时间：
2012-03
期刊：
影响因子：
3.6
通讯作者：
Ningbo Zhao;Lei Yang;Xiaoying Li
中科院分区：
文献类型：
--
作者：
Ningbo Zhao;Lei Yang;Xiaoying Li
我们研究了一种新的方案命名为自发参量光纤环（SPFL），配置通过故意引入色散元件的非线性Sagnac环，并表明它可以作为一个被动的光子对开关。从SPFL输出的双光子态高度依赖于在环中反向传播的光子对的色散诱导相位差。通过适当地管理色散元件，具有一定失谐和带宽的信号光子和闲频光子对可以被引导到SPFL的期望空间模式。如果光子对被用来产生预示的单光子，那么SPFL可以被看作是单光子的开关。此外，我们对基于色散的相位调制的研究也有利于设计全光纤纠缠光子源。
We study a novel scheme named the spontaneous parametric fiber loop (SPFL), configured by deliberately introducing dispersive elements into the nonlinear Sagnac loop, and show it can function as a passive switch of photon pairs. The two-photon state coming out of SPFL highly depends on the dispersion induced phase difference of photon pairs counterpropagating in the loop. By properly managing the dispersive elements, the signal and idler photons of a pair with a certain detuning and bandwidth can be directed to the desired spatial modes of SPFL. If the photon pairs are used to generate heralded single photons, the SPFL can be viewed as a switch of single photons. Moreover, our investigation about the dispersion based phase modulation is also beneficial for designing all fiber sources of entangled photon pairs.