2GHz波导谐振腔产生光子对的时间箱特性
Time-Bin Properties of Photon Pairs from a 2GHz Waveguide Resonator
浏览论文内容
中文总结 AI 辅助
本研究通过2GHz波导谐振腔产生光子对，测量并模拟其时间箱特性，发现信号光与闲频光时间箱差异源于光学损耗，为窄带宽脉冲量子网络提供经验依据。
中文摘要 AI 辅助
我们在法布里-珀罗波导谐振腔中通过参量下转换（PDC）产生简并光子对，称为信号光和闲频光，该谐振腔在电信C波段具有接近2GHz的带宽。我们的PDC源基于II型周期极化铌酸锂波导，其端面具有高反射率，形成谐振腔。在从多模PDC发射中选择单个谐振腔模式后，我们测量了信号光和闲频光之间的光子对关联强度。随后，我们使用标准光子计数技术研究了它们的亚纳秒长脉冲形状，即时间箱。我们发现时间箱持续时间彼此差异显著，这可以通过交叉偏振的信号光和闲频光的不同光学损耗来预测。此外，我们通过信号光和闲频光联合频谱特性的傅里叶变换模拟了它们的时间特性。我们的结果为光子对的时间箱提供了经验性见解，对于推动未来量子网络在窄带宽边缘但仍处于脉冲状态下的运行具有重要意义。
英文摘要
We produce degenerate photon pairs called signal and idler via parametric down-conversion (PDC) in a Fabry-Pérot waveguide resonator having close to a 2GHz bandwidth in the telecom C-band. Our PDC source is based on a type-II periodically-poled Lithium Niobate waveguide with high-reflecting end facets forming the resonator. We measure the strength of the photon-pair correlation between signal and idler after selecting a single resonator mode from the multimode PDC emission. Thereafter, we investigate their sub-nanosecond long pulse shapes, in other words the time bins, with standard photon counting. We find that the time-bin durations vary significantly from each other, which can be predicted by the different optical losses of the cross-polarized signal and idler. Further, we simulate the temporal properties of signal and idler via the Fourier transform of their joint spectral characteristics. Our results deliver empiric insight about the time bins of photon pairs and are relevant for driving future quantum networks at the edge to narrow bandwidths but nevertheless in the pulsed regime.
发表机构
- German Aerospace Center (DLR e.V.)（德国航空航天中心（DLR e.V.））
机构由 AI 辅助整理，请以论文原文为准。
