Year: 2024
Type: article
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.
Source: Physical Review A
Institutions: National Research Council Canada, University of Ottawa
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4390908776