  Quantum cryptography allows confidential information to be communicated
between two parties, with secrecy guaranteed by the laws of nature alone.
However, upholding guaranteed secrecy over quantum communication networks poses
a further challenge, as classical receive-and-resend routing nodes can only be
used conditional of trust by the communicating parties. Here, we demonstrate
the operation of a quantum relay over 1 km of optical fiber, which teleports a
sequence of photonic quantum bits to a receiver by utilizing entangled photons
emitted by a semiconductor LED. The average relay fidelity of the link is
0.90+/-0.03, exceeding the classical bound of 0.75 for the set of states used,
and sufficiently high to allow error correction. The fundamentally low
multi-photon emission statistics and the integration potential of the source
present an appealing platform for future quantum networks.
