2014/07/11 by Nicolas Maring, Maring, Nicolas, Kutlu Kutluer +11
Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Photorefractive and Nonlinear Optics #Quantum Physics (quant-ph) #Quantum optics and atomic interactions #quant-ph
paper · pdf · doi:10.48550/arxiv.1407.3094
openalex publication_date 2014/07/11 · arxiv created 2014/10/01 · arxiv updated 2014/10/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on an experiment that demonstrates the frequency up-conversion of telecommunication wavelength single-photon-level pulses to be resonant with a Pr3+:Y2SiO5 crystal. We convert the telecom photons at 1570 nm to 606 nm using a periodically-poled potassium titanyl phosphate nonlinear waveguide. The maximum device efficiency (which includes all optical loss) is inferred to be ηdevmax = 22 ± 1 % (internal efficiency ηint = 75±8 %) with a signal to noise ratio exceeding 1 for single-photon-level pulses with durations of up to 560 ns. The converted light is then stored in the crystal using the atomic frequency comb scheme with storage and retrieval efficiencies exceeding ηAFC = 20 % for predetermined storage times of up to 5 μs. The retrieved light is time delayed from the noisy conversion process allowing us to measure a signal to noise ratio exceeding 100 with telecom single-photon-level inputs. These results represent the first demonstration of single-photon-level optical storage interfaced with frequency up-conversion.