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

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

1 Citation (Scopus)

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 publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6457
DOIs
StatePublished - 2007
EventFree-Space Laser Communication Technologies XIX and Atmospheric Propagation of Electromagnetic Waves - San Jose, CA, United States
Duration: Jan 24 2007Jan 25 2007

Other

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

Fingerprint

Atmospheric turbulence
atmospheric turbulence
Scintillation
scintillation
Laser beams
laser beams
Wavelength
wavelengths
Turbulence
configurations
turbulence
Optical links
optical communication
Detectors
detectors
approximation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

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

Scintillation index for N Gaussian laser beams with different wavelengths in weak atmospheric turbulence. / Peleg, A.; Moloney, Jerome V.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6457 2007. 64570M.

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

Peleg, A & Moloney, JV 2007, Scintillation index for N Gaussian laser beams with different wavelengths in weak atmospheric turbulence. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6457, 64570M, Free-Space Laser Communication Technologies XIX and Atmospheric Propagation of Electromagnetic Waves, San Jose, CA, United States, 1/24/07. https://doi.org/10.1117/12.711187
Peleg A, Moloney JV. Scintillation index for N Gaussian laser beams with different wavelengths in weak atmospheric turbulence. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6457. 2007. 64570M https://doi.org/10.1117/12.711187
Peleg, A. ; Moloney, Jerome V. / Scintillation index for N Gaussian laser beams with different wavelengths in weak atmospheric turbulence. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6457 2007.
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