Upgrades on the Caltech quantum network teleportation system

Quantum teleportation, one of the fascinating predictions of quantum mechanics, has been recently demonstrated with at least 90% fidelity in the telecommunication C-band at 1536 nm at the Caltech quantum network. Here we report upgrades of our system towards remote and replicable installations-- key requirements for deployment in real-world settings. Expensive Arbitrary Waveform Generators (AWGs) and high-bandwidth electrical amplifiers have been replaced by a homemade pulse shaper and amplifier, respectively, with almost negligible impact on the quality of the qubit states. Light in the telecommunication O-band at 1310 nm is distributed in the same fiber carrying entangled photons, thereby demonstrating not only the much needed co-existence of quantum light with classical communication for wide employability of quantum systems, but also the ability to synchronize remote nodes in a network. Finally, a novel data acquisition system with continuous monitoring of critical experimental parameters has also been developed, allowing uninterrupted data acquisition over long timescales.