超快自发参量下转换中频谱可分辨性的消除
Eliminating Spectral Distinguishability in Ultrafast Spontaneous Parametric Down-conversion
摘要：
利用飞秒脉冲下转换产生具有精确定时的偏振纠缠光子对时，通常会面临偏振纠缠质量下降的问题。在以前的实验中，我们已经表明，这种退化是由两个衰变路径之间的光谱可分辨性引起的，与理论预测一致。在这里，我们提出了一个实验研究的光谱补偿方案提出并首次实施的金等人。在2002年。通过测量光子对偏振相关的联合光谱特性，我们表明下转换分量之间的光谱可区分性被消除。该方案在没有任何光谱滤波的情况下在偏振基础上产生97.9+/-0.5%的可见度。
英文摘要：
Generation of polarization-entangled photon pairs with a precise timing through down-conversion of femtosecond pulses is often faced with a degraded polarization entanglement quality. In a previous experiment we have shown that this degradation is induced by spectral distinguishability between the two decay paths, in accordance with theoretical predictions. Here, we present an experimental study of the spectral compensation scheme proposed and first implemented by Kim et al. in 2002. By measuring the joint spectral properties of the polarization correlations of the photon pairs, we show that the spectral distinguishability between the down-converted components is eliminated. This scheme results in a visibility of 97.9+/-0.5% in the polarization basis without any spectral filtering.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
