Highly efficient frequency conversion with bandwidth compression of quantum light
arXiv:1610.08326 · doi:10.1038/ncomms14288
Abstract
Hybrid quantum networks rely on efficient interfacing of dissimilar quantum nodes, since elements based on parametric down-conversion sources, quantum dots, color centres or atoms are fundamentally different in their frequencies and bandwidths. While pulse manipulation has been demonstrated in very different systems, to date no interface exists that provides both an efficient bandwidth compression and a substantial frequency translation at the same time. Here, we demonstrate an engineered sum-frequency-conversion process in Lithium Niobate that achieves both goals. We convert pure photons at telecom wavelengths to the visible range while compressing the bandwidth by a factor of 7.47 under preservation of non-classical photon-number statistics. We achieve internal conversion efficiencies of 75.5%, significantly outperforming spectral filtering for bandwidth compression. Our system thus makes the connection between previously incompatible quantum systems as a step towards usable quantum networks.
References in corpus (10)
- The Quantum Internet
- Heralded Generation of Ultrafast Single Photons in Pure Quantum States
- Probing multimode squeezing with correlation functions
- A bright, pulsed two-mode squeezer
- Fiber-assisted single-photon spectrograph
- Widely tunable single photon source with high purity at telecom wavelength
- Interfacing GHz-bandwidth heralded single photons with a room-temperature Raman quantum memory
- Pulsed source of spectrally uncorrelated and indistinguishable photons at telecom wavelengths
- Theory of high-efficiency sum-frequency generation for single-photon waveform conversion
- Broadband, noise-free optical quantum memory with neutral nitrogen-vacancy centers in diamond