Low-noise frequency conversion of single photons is a critical tool in establishing fibre-based quantum networks. We show that a single photonic crystal fibre can achieve frequency conversion by Bragg-scattering four-wave mixing of source photons from an ultra-broad wavelength range by engineering a symmetric group velocity profile. Furthermore, we discuss how pump tuning can mitigate realistic discrepancies in device fabrication. This enables a single highly adaptable frequency conversion interface to link disparate nodes in a quantum network via the telecoms band.

中文翻译：

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用于超可调量子频率转换的光子晶体光纤中的群速度对称性

单光子的低噪声频率转换是建立基于光纤的量子网络的关键工具。我们表明，通过设计对称群速度分布，单个光子晶体光纤可以通过来自超宽波长范围的源光子的布拉格散射四波混合来实现频率转换。此外，我们讨论了泵调谐如何减轻设备制造中的实际差异。这使得单个高度适应性的频率转换接口能够通过电信频段连接量子网络中的不同节点。