Processing and distributing quantum information using photons through fibre-optic or free-space links is essential for building future quantum networks. The scalability needed for such networks can be achieved by employing photonic quantum states that are multiplexed into time and/or frequency, and light-matter interfaces that are able to store and process such states with large time-bandwidth product and multimode capacities. Despite important progress in developing such devices, the demonstration of these capabilities using non-classical light remains challenging. Employing the atomic frequency comb quantum memory protocol in a cryogenically cooled erbium-doped optical fibre, we report the quantum storage of heralded single photons at a telecom-wavelength (1.53 {\mu}m) with a time-bandwidth product approaching 800. Furthermore we demonstrate frequency-multimode storage as well as memory-based spectral-temporal photon manipulation. Notably, our demonstrations rely on fully integrated quantum technologies operating at telecommunication wavelengths, i.e. a fibre-pigtailed nonlinear waveguide for the generation of heralded single photons, an erbium-doped fibre for photon storage and manipulation, and fibre interfaced superconducting nanowire devices for efficient single photon detection. With improved storage efficiency, our light-matter interface may become a useful tool in future quantum networks.
@article{arxiv.1511.01384,
title = {A multiplexed light-matter interface for fibre-based quantum networks},
author = {Erhan Saglamyurek and Marcel. li Grimau Puigibert and Qiang Zhou and Lambert Giner and Francesco Marsili and Varun B. Verma and Sae Woo Nam and Lee Oesterling and David Nippa and Daniel Oblak and Wolfgang Tittel},
journal= {arXiv preprint arXiv:1511.01384},
year = {2016}
}