论文标题
Sagnac型纠缠的光子源仅使用常规极化光学器件
Sagnac-type entangled photon source using only conventional polarization optics
论文作者
论文摘要
我们设计并实施了一种与马赫·齐纳德干涉仪的Sagnac-Interferometer的新型组合，用于偏振符号的光子源。新的多功能配置不需要多波长极化光学器件，但在宽波长范围内具有良好的极化质量和相位稳定性。我们仅使用标准商业光学器件证明了干涉仪，以实验实现764nm和1221nm的波长脉冲生成，并通过I型自发性四波混合在偏振纤维中。通过极化相关的测量值验证了极化纠缠，而原始重合计数的可见性为95.5％，并且违反了clauser-horne-shorne-holt-holt（CHSH）不平等，$ s = 2.70 \ pm0.04 $。长期的相位稳定性的特征是在大约1小时的集成时间内，Allan的偏差为8 $^\ Circ $，而没有主动的相位稳定。
We designed and implemented a novel combination of a Sagnac-interferometer with a Mach-Zehnder interferometer for a source of polarization-entangled photons. The new versatile configuration does not require multi-wavelength polarization optics, yet it performs with a good polarization quality and phase-stability over a wide wavelength range. We demonstrate the interferometer using only standard commercial optics to experimentally realize the pulsed generation of polarization-entangled photon-pairs at wavelengths of 764nm and 1221nm via type-I spontaneous four-wave mixing in a polarization-maintaining fiber. Polarization entanglement was verified by a polarization-correlation measurement with a visibility of 95.5% from raw coincidence counts and the violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality with $S=2.70\pm0.04$. The long-term phase-stability was characterized by an Allan deviation of 8$^\circ$ over an integration time of about 1 hour with no active phase-stabilization.
