Experimental validation and design feasibility of a compact interferometric refractive index structure constant measurement sensor for atmospheric turbulence characterization

Land, Jay E.; Whitley, Daniel J.

doi:10.1117/12.2594129

Cited by 1 publication

(2 citation statements)

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“…Furthermore, θ is calculated with Equation ( 5) [26] in terms of reference pressure that is equal to 1000 hPa. θ = T P 0 P 0.286 (5) Having in mind Equations ( 4) and ( 5), the final equation for C 2 n is provided in (6).…”

Section: Atmospheric Turbulence Attenuation Based On Raob Databasementioning

confidence: 99%

“…While it is still in an early development phase, it is claimed that backscatter-effect-based technology applying Rayleigh beaconing and collecting telescope offers a reliable evaluation of slant atmospheric turbulence profiles. In contrast to this intricate but highly productive method, a state-of-the-art concept for a compact device implementing an interferometric refractive index sensor is given in [6]. This interferometric approach widely used in the field of meteorology science offers a solution for figuring out the fringe frequency (i.e., atmospheric refractive index) that is easy for use in an outdoor environment, and once installed in an unmanned aircraft system, a vertical atmospheric turbulence profile can be built.…”

Section: Introductionmentioning

confidence: 99%

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Testbed Emulator of Satellite-to-Ground FSO Downlink Affected by Atmospheric Seeing Including Scintillations and Clouds

et al. 2022

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Free Space Optics (FSO) technology enabling next-generation near-Earth communication is prone to severe propagation losses due to atmospheric-turbulence-induced fading and Mie scattering (clouds). As an alternative to the real-time evaluation of the weather effects over optical signal, a state-of-the-art laboratory testbed for verification of slant APD-based (Avalanche Photodiode) FSO links in laboratory conditions is proposed. In particular, a hardware channel emulator representing an FSO channel by means of fiber-coupled Variable Optical Attenuator (VOA) controlled by driver board and software is utilized. While atmospheric scintillation data are generated based on Radiosonde Observation (RAOB) databases combined with a statistical design approach, cloud attenuation is introduced using Mie theory together with empirical Log-Normal modeling. The estimation of atmospheric-turbulence-induced losses within the emulated optical downlink is done with an FSO IM/DD prototype (Intensity Modulation/Direct Detection) relying on two different data throughputs using a transmitter with external and internal modulation. Moreover, the receiver under-test is a high-speed 10 Gbps APD photodetector with integrated Transimpedance Amplifier (TIA) typically installed in OGSs (Optical Ground Stations) for LEO/GEO satellite communication. The overall testbed performance is addressed by a BER tester and a digital oscilloscope, providing BER graphs and eye diagrams that prove the applied approach for testing APD-TIA in the presence of weather-based disruptions. Furthermore, the testbed benefits from the used beam camera that measures the quality of the generated FSO beam.

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Section: Atmospheric Turbulence Attenuation Based On Raob Databasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Testbed Emulator of Satellite-to-Ground FSO Downlink Affected by Atmospheric Seeing Including Scintillations and Clouds

et al. 2022

View full text Add to dashboard Cite

show abstract

Experimental validation and design feasibility of a compact interferometric refractive index structure constant measurement sensor for atmospheric turbulence characterization

Cited by 1 publication

References 4 publications

Testbed Emulator of Satellite-to-Ground FSO Downlink Affected by Atmospheric Seeing Including Scintillations and Clouds

Testbed Emulator of Satellite-to-Ground FSO Downlink Affected by Atmospheric Seeing Including Scintillations and Clouds

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