TY - JOUR TI - Power losses in diffuse ultraviolet optical communications channels AU - Raptis, N. AU - Pikasis, E. AU - Syvridis, D. JO - Chinese Optics Letters PY - 2016 VL - 41 TODO - 18 SP - 4421-4424 PB - OSA - The Optical Society SN - 1671-7694 TODO - 10.1364/OL.41.004421 TODO - Intelligent systems; Monte Carlo methods; Photomultipliers; Positron emission tomography, Atmospheric conditions; Communications channels; Free-space optical communications systems; Loss properties; Monte carlo simulation technique; Non-line-of-sight; Photo multiplier tube; Scattering effects, Optical communication TODO - One of the most critical parameters in free-space optical communications systems operating in a non-line-of-sight regime are the optical losses. In this Letter, we numerically calculate these losses taking into account the scattering effects using the Monte Carlo simulation technique. The obtained results are compared with experimentally obtained data at 265 nm (solar-blind UV regime). A large set of measurements at distances up to 20 m, for different elevation angles of the transmitter (UV-LEDs) and receiver (photo-multiplier tube) and for different atmospheric conditions has been taken for the characterization of the optical communications channel in terms of its loss properties. © 2016 Optical Society of America. ER -