Center for Photonic Communication and Computing, EECS Department, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3118, USA.
Opt Lett. 2010 Mar 15;35(6):802-4. doi: 10.1364/OL.35.000802.
We have constructed and experimentally characterized what we believe to be the first fiber-based source of degenerate polarization-entangled photon pairs in the telecommunication band. Our source design utilizes bichromatic pump pulses and an optical-fiber Sagnac loop aligned to deterministically separate degenerate photon pairs at a central wavelength. The source exhibits 0.997+/-0.006 fidelity with a maximally entangled state, measured using quantum state tomography. When reconfigured to produce identical photon pairs, the source exhibits a Hong-Ou-Mandel interference visibility of 0.97+/-0.04.
我们构建并实验验证了我们认为的首例在电信波段基于光纤的简并偏振纠缠光子对源。我们的源设计利用双色泵浦脉冲和光纤 Sagnac 环，以确定在中心波长分离简并光子对。该源的量子态层析测量显示其最大纠缠态保真度为 0.997+/-0.006。当重新配置为产生相同的光子对时，源的 Hong-Ou-Mandel 干涉可见度为 0.97+/-0.04。
