Entangled light emitting diodes based on semiconductor quantum dots are promising devices for security sensitive quantum network applications, thanks to their natural lack of multi photon-pair generation. Apart from telecom wavelength emission, network integrability of these sources ideally requires electrical operation for deployment in compact systems in the field. For multiplexing of entangled photons with classical data traffic, emission in the telecom O-band and tuneability to the nearest wavelength channel in compliance with coarse wavelength division multiplexing standards (20 nm channel spacing) is highly desirable. Here we show a fully electrically operated telecom entangled light emitting diode with wavelength tuneability of more than 25 nm, deployed in an installed fibre network. With the source tuned to 1310.00 nm, we demonstrate multiplexing of true single entangled photons with classical data traffic and achieve entanglement fidelities above 94% on an installed fibre in a city.

基于半导体量子点的纠缠发光二极管由于其自然缺乏多光子对生成而成为安全敏感的量子网络应用的有前途的设备。除了电信波长发射外，这些源的网络可集成性理想地还要求电气操作以在现场紧凑型系统中进行部署。为了将纠缠的光子与经典数据流量进行复用，非常需要电信O波段中的发射以及可调谐到最近的波长信道，并符合粗糙的波分复用标准（信道间隔为20 nm）。在这里，我们展示了部署在已安装的光纤网络中的，波长可调谐性超过25 nm的全电动电信纠缠发光二极管。将光源调谐到1310.00 nm，