2016/03/28 by Fumihiro Kaneda, Karina Garay-Palmett, Alfred B. U’Ren +2 · 2 citations
Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Optical Sensing Technologies #Amplified spontaneous emission #Broadband #Optical fiber #Parametric statistics #Phase matching #Photon #Photorefractive and Nonlinear Optics #Potassium titanyl phosphate #Pulse shaping #Quantum optics #Spontaneous parametric down-conversion #quant-ph
paper · pdf · doi:10.1364/oe.24.010733
arxiv created 2016/03/28 · openalex publication_date 2016/05/09 · arxiv updated 2016/05/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We report on the generation of an indistinguishable heralded single-photon state, using highly nondegenerate spontaneous parametric downconversion (SPDC). Spectrally factorable photon pairs can be generated by incorporating a broadband pump pulse and a group-velocity matching (GVM) condition in a periodically-poled potassium titanyl phosphate (PPKTP) crystal. The heralding photon is in the near IR, close to the peak detection efficiency of off-the-shelf Si single-photon detectors; meanwhile, the heralded photon is in the telecom L-band where fiber losses are at a minimum. We observe spectral factorability of the SPDC source and consequently high purity (90%) of the produced heralded single photons by several different techniques. Because this source can also realize a high heralding efficiency (> 90%), it would be suitable for time-multiplexing techniques, enabling a pseudo-deterministic single-photon source, a critical resource for optical quantum information and communication technology.