Transmission of single photons through atmospheric turbulence with spatial diversity

Andres I. Seguel, Jaime A. Anguita, Carlos S. Pirela

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

Resumen

A multiple-input single-output configuration is used to study the effectiveness of spatial diversity in reducing single-photon losses caused by atmospheric turbulence in quantum communications over free-space. The system consists of two transmitters and a single receiver, where two parallel beams are transmitted, each comprising a 660-nm beacon and a 515-nm collinear single-photon signal. The beacon is intended to compare the turbulence conditions on each path to determine the most suitable transmitter for the single-photon signal. An outdoor experimental campaign with a propagation distance of 500 meters was conducted to obtain results under real turbulence conditions. First, the correlation between the 515-nm and 660-nm collinear signals was measured at 0.82, showing that the beacon signal accurately represents the state of turbulence affecting the single-photon signal most of the time. The spatial correlation was measured at separation distances between the transmitters of 12 and 20 centimeters, yielding correlation coefficients of 0.35 and 0.17, respectively. As expected, the spatial correlation decreases with increasing separation distance. Finally, a slight improvement in the detection of the single-photon signal was observed when using spatial diversity, but further improvements to the system and longer propagation distances are needed to obtain more promising results.

Idioma originalInglés
Título de la publicación alojadaLaser Communication and Propagation through the Atmosphere and Oceans XIII
EditoresJaime A. Anguita, Jeremy P. Bos, David T. Wayne
EditorialSPIE
ISBN (versión digital)9781510679542
DOI
EstadoPublicada - 2024
EventoLaser Communication and Propagation through the Atmosphere and Oceans XIII 2024 - San Diego, Estados Unidos
Duración: 20 ago. 202421 ago. 2024

Serie de la publicación

NombreProceedings of SPIE - The International Society for Optical Engineering
Volumen13147
ISSN (versión impresa)0277-786X
ISSN (versión digital)1996-756X

Conferencia

ConferenciaLaser Communication and Propagation through the Atmosphere and Oceans XIII 2024
País/TerritorioEstados Unidos
CiudadSan Diego
Período20/08/2421/08/24

Nota bibliográfica

Publisher Copyright:
© 2024 SPIE.

Huella

Profundice en los temas de investigación de 'Transmission of single photons through atmospheric turbulence with spatial diversity'. En conjunto forman una huella única.

Citar esto