A. Prokes and M. Sigmund (Czech Republic)
Atmospheric attenuation, avalanche photodiode, PIN photodiode, meteorological visibility, optical receiver sensitivity
In the paper, the parameters of free space optical links which are most dependent on the optical wavelength are discussed. The paper deals with the comparison of the atmospheric attenuation at 850 nm and 1550 nm caused by turbulence and scattering by the particles present in the atmosphere and with comparison of the optical receiver sensitivity in dependence on a bit rate for both wavelength. Presented calculations are demonstrated on the connection of avalanche and PIN photodiodes with a high-impedance amplifier using a MOSFET and with a transimpedance amplifier using a bipolar junction transistor. It is assumed that the silicon photodiodes work at a wavelength of 850 nm and the InGaAs photodiodes at 1550 nm.
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