Photon-count fluctuations of spontaneous parametric down conversion exhibit long-range correlations
Document Type
Article
Publication Date
9-1-2024
Abstract
We investigate the fluctuation dynamics of photons generated by spontaneous parametric down conversion (SPDC) using detrended fluctuation analysis (DFA). SPDC photon pairs were generated via a periodically poled potassium titanyl phosphate waveguide, pumped by a 405 nm continuous-wave laser. The scaling exponents obtained from DFA reveal that SPDC photons exhibit long-range correlations at high pump power regimes. The average scaling exponent of DFA increases from 0.67 to 0.97 as the laser diode drive current increases, indicating the existence of long-range correlations. Our analysis concluded that the scaling exponent of aggregated time series is correlated to the number of SPDC photon pairs. (c) 2024 Optica Publishing Group
Divisions
PHYSICS,photonics
Funders
Malaysian Ministry of Higher Education Fundamental Research Grant Scheme (FRGS/1/2020/STG07/UM/01/2)
Publication Title
Journal of the Optical Society of America B-Optical Physics
Volume
41
Issue
9
Publisher
Optica Publishing Group
Publisher Location
2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA