Experimental Investigation of the Effective Spectrum Bandwidth of the FSO Link with Scintillation

Zahra Nazari Chaleshtori (1) , Gholami Asghar (2) , Zabih Ghassemlooy (3) , Stanislav Zvanovec (1)

1 CTU - Czech Technical University in Prague
2 Isfahan University of Technology
3 University of Northumbria at Newcastle [United Kingdom]

In free space optical (FSO) communications, the link performance is highly dependent on the atmospheric conditions including turbulence, which causes fluctuations in both the intensity and the phase of the received optical wavefront. In this paper, we experimentally investigate the FSO link considering the ambient temperature and the sun irradiation angle parameters. Furthermore, we investigate the scintillation effect on the FSO link in the frequency domain and present temporal spectra of the irradiance fluctuations. It is worth since it can be helpful to compensate the scintillation effect in a FSO link using adaptive optical alignment system. In addition, we show the measured effective spectrum bandwidth of fluctuations in moderate turbulence is less than 250 Hz for a 220 m link length, and evaluate the environmental effects on it under different turbulence conditions.

Mots clés: scintillation; turbulence; refractive index structure parameter; temporal spectra; FSO

Domaines: Traitement du signal et de l'image [eess.SP]

Zahra Nazari Chaleshtori, Gholami Asghar, Zabih Ghassemlooy, Stanislav Zvanovec. Experimental Investigation of the Effective Spectrum Bandwidth of the FSO Link with Scintillation. 1st West Asian Colloquium on Optical Wireless Communications (WACOWC2018), Apr 2018, Isfahan, Iran. ⟨hal-02060245⟩