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arXiv:2401.18077 · Physical Review A

Toward deterministic sources: Photon generation in a fiber-cavity quantum memory

Philip J. Bustard, Ramy Tannous, Kent Bonsma-Fisher, Daniel Poitras, Cyril Hnatovsky, Stephen J. Mihailov, Duncan G. England, Benjamin Sussman

Published Jan 16, 2024• 7 citations
arXivHTMLPDF

Abstract

We demonstrate the generation of photons within a fiber-cavity quantum memory, followed by later on-demand readout. Signal photons are generated by spontaneous four-wave mixing in a fiber cavity comprising a birefringent fiber with dichroic reflective end facets. The detection of the partner herald photon indicates the creation of the stored signal photon. After a delay, the signal photon is switched out of resonance with the fiber cavity by intracavity frequency translation using Bragg scattering four-wave mixing, driven by ancillary control pulses. We measure sub-Poissonian statistics in the output signal mode, with ${g}_{\text{AC}}^{(2)}=0.54(1)$ in the first readout bin and a readout frequency translation efficiency of $\ensuremath{\approx}80%$. The $1/e$ memory lifetime is $\ensuremath{\approx}67$ cavity cycles, or 1.68 $\textmu{}\mathrm{s}$. In an alternate fiber cavity, we show a strategy for noise reduction and measure ${g}_{\text{AC}}^{(2)}=0.068(10)$ after one cavity cycle.

DOI
10.1103/physreva.109.013711

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