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- W1680841342 abstract "Terrestrial point to point and earth-satellite based free-space optical communications offer higher security and wider bandwidth than is available in the microwave band. However, refractive index fluctuations along the atmospheric path bend, broaden and attenuate the optical beam. They also give rise to interference noise and to both transverse and longitudinal phase noise. They cause amplitude and intensity noise (scintillation) and phase noise on millisecond scales and picosecond scale jitter in the time of arrival of optical pulses. Off-axis scattering by turbulent eddies and aerosols also causes pulse broadening and distortion of short pulses. We outline the amplitude, time and frequency domain characteristics of atmospheric propagation noise with particular relevance to ultra-broadband and quantum cryptographic photon-counting communication systems. New results emerging from the University of Canberra - RMIT - Monash University - Canberra Institute of Technology Free-Space Optical Communications Test Bed obtained over atmospheric path lengths between 4 and 40 km are discussed." @default.
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- W1680841342 date "2004-04-01" @default.
- W1680841342 modified "2023-09-28" @default.
- W1680841342 title "Propagation noise in broadband free-space optical communication systems" @default.
- W1680841342 doi "https://doi.org/10.1117/12.547353" @default.
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