Scintillation index for N Gaussian laser beams with different wavelengths in weak atmospheric turbulence

A. Peleg, J. V. Moloney

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We study the scintillation index of N partially overlapping lowest order Gaussian laser beams with different wavelengths in weak atmospheric turbulence. Assuming a Von Karman turbulence spectrum and slow detector response and using the Rytov approximation we calculate the longitudinal and radial components of the scintillation index for typical free-space laser communication setups. We find the initial beam separation that minimizes the longitudinal scintillation and corresponds to the optimal beam configuration. Further reduction of the longitudinal scintillation is obtained by optimizing with respect to both initial beam separation and initial spot size. The longitudinal scintillation of the optimal N-beam configurations is inversely proportional to N, resulting in a 92% reduction for a 9-beam system compared with the single beam value. The existence of the minimum of longitudinal scintillation is not very sensitive to the form of the turbulence spectrum. Moreover, the radial scintillation values for the optimal N-beam configurations are found to be significantly smaller than the corresponding single beam values, and this reduction effect also grows with increasing N.

Original languageEnglish (US)
Title of host publicationFree-Space Laser Communication Technologies XIX and Atmospheric Propagation of Electromagnetic Waves
DOIs
StatePublished - Apr 30 2007
EventFree-Space Laser Communication Technologies XIX and Atmospheric Propagation of Electromagnetic Waves - San Jose, CA, United States
Duration: Jan 24 2007Jan 25 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6457
ISSN (Print)0277-786X

Other

OtherFree-Space Laser Communication Technologies XIX and Atmospheric Propagation of Electromagnetic Waves
CountryUnited States
CitySan Jose, CA
Period1/24/071/25/07

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Scintillation index for N Gaussian laser beams with different wavelengths in weak atmospheric turbulence'. Together they form a unique fingerprint.

  • Cite this

    Peleg, A., & Moloney, J. V. (2007). Scintillation index for N Gaussian laser beams with different wavelengths in weak atmospheric turbulence. In Free-Space Laser Communication Technologies XIX and Atmospheric Propagation of Electromagnetic Waves [64570M] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6457). https://doi.org/10.1117/12.711187