Reduction of scintillation using broad spectrum optical source for use in FSO

Conor M. Pogue; David T. Wayne; Mark Lasher

doi:10.1117/12.2635906

30 September 2022 Reduction of scintillation using broad spectrum optical source for use in FSO

Conor M. Pogue, David T. Wayne, Mark Lasher

Proceedings Volume 12237, Laser Communication and Propagation through the Atmosphere and Oceans XI; 122370E (2022) https://doi.org/10.1117/12.2635906
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Free Space Optical links suffer from atmospheric effects where turbulence causes the beam to break up (scintillation), which could increase the variance in the signal at the receiver and ultimately worsening the optical link. Various techniques to reduce scintillation exist to alter how the atmosphere will affect the beam, one of them being wavelength diversity of the optical source. Diversifying the wavelength can reduce the scintillation of the optical beam due to the wavelength dependence on the refractive index of the atmosphere. An experiment was conducted comparing a broadband laser source and a monochromatic source over an instrumented 13.5km path. Beam profile and scintillation measurements were conducted along with BLS-2000 C_n² measurements. This experiment investigates the effects of a short-coherence length / broad-band nature of a source and its ability to reduce scintillation in turbulent atmosphere. This paper will discuss the experimental setup, analysis, and conclusions of this novel experiment.

Conference Presentation

Citation Download Citation

Conor M. Pogue, David T. Wayne, and Mark Lasher "Reduction of scintillation using broad spectrum optical source for use in FSO", Proc. SPIE 12237, Laser Communication and Propagation through the Atmosphere and Oceans XI, 122370E (30 September 2022); https://doi.org/10.1117/12.2635906

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