Quantum frequency conversion of quantum memory compatible photons to telecommunication wavelengths
arXiv:1308.0912 · doi:10.1364/OE.21.019473
Abstract
We report an experiment demonstrating quantum frequency conversion of weak light pulses compatible with atomic quantum memories to telecommunication wavelengths. We use a PPLN nonlinear waveguide to convert weak coherent states at the single photon level with a duration of 30ns from a wavelength of 780nm to 1552nm. We measure a maximal waveguide internal (external) conversion efficiency eta_int = 0.41 (eta_ext = 0.25), and we show that the signal to noise ratio (SNR) is good enough to reduce the input photon number below 1. In addition, we show that the noise generated by the pump beam in the crystal is proportional to the spectral bandwidth of the device, suggesting that narrower filtering could significantly increase the SNR. Finally, we demonstrate that the quantum frequency converter can operate in the quantum regime by converting a time-bin qubit and measuring the qubit fidelity after conversion.
15 pages, 5 figures (To appear in Optics Express)
References in corpus (8)
- Experimental demonstration of a BDCZ quantum repeater node
- A Single-Atom Quantum Memory
- Visible-to-telecom quantum frequency conversion of light from a single quantum emitter
- Quantum Frequency Translation of Single-Photon States in Photonic Crystal Fiber
- Two-photon interference using background-free quantum frequency conversion of single photons from a semiconductor quantum dot
- Conditional control of the quantum states of remote atomic memories for quantum networking
- Quantum frequency downconversion experiment
- Approaches for a quantum memory at telecommunication wavelengths
Cited by in corpus (18)
- Prospective applications of optical quantum memories
- Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
- A Waveguide Frequency Converter Connecting Rubidium Based Quantum Memories to the Telecom C-Band
- Quantum frequency conversion of memory-compatible single photons from 606 nm to the telecom C-band
- Two dimensional quantum repeaters
- Telecom-band quantum optics with ytterbium atoms and silicon nanophotonics
- Second harmonic microscopy of poled x-cut thin film lithium niobate: Understanding the contrast mechanism
- Entanglement between a photonic time-bin qubit and a collective atomic spin excitation
- Non-classical correlations between a C-band telecom photon and a stored spin-wave
- Spectral noise in quantum frequency down-conversion from the visible to the telecommunication C-band
- Shape-preserving and unidirectional frequency conversion using four-wave mixing Bragg scattering
- Two-way single-photon-level frequency conversion between 852nm and 1560nm for connecting cesium D2 line with the telecom C-band
- Two-step frequency conversion for connecting distant quantum memories by transmission through an optical fiber
- A Simple and Efficient Absorption Filter for Single Photons from a Cold Atom Quantum Memory
- Towards continuous-wave regime teleportation for light matter quantum relay stations
- Low random duty-cycle errors in periodically-poled KTP revealed by sum-frequency generation
- Spectrum-to-position mapping via programmable spatial dispersion implemented in an optical quantum memory
- Temporally-long C-band heralded single photons generated from hot atoms