Performance analysis of underwater wireless optical communication systems over a wide range of optical turbulence
Sign Up to like & getrecommendations! Published in 2018 at "Optics Communications"
DOI: 10.1016/j.optcom.2018.07.029
Abstract: Abstract The propagation of optical signal under water is affected by three major degrading phenomena, namely absorption, scattering, and turbulence. The statistical distribution of turbulence-induced fading though has not yet been well characterized. In this… read more here.
Keywords: wireless optical; optical turbulence; optical communication; turbulence ... See more keywords
Limitations imposed by optical turbulence profile structure and evolution on tomographic reconstruction for the ELT
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa795
Abstract: The performance of tomographic adaptive optics (AO) systems is intrinsically linked to the vertical profile of optical turbulence. First, a sufficient number of discrete turbulent layers must be reconstructed to model the true continuous turbulence… read more here.
Keywords: optical turbulence; tomographic reconstruction; evolution; turbulence ... See more keywords
Deep learning for anisoplanatic optical turbulence mitigation in long-range imaging
Sign Up to like & getrecommendations! Published in 2021 at "Optical Engineering"
DOI: 10.1117/1.oe.60.3.033103
Abstract: Abstract. We present a deep learning approach for restoring images degraded by atmospheric optical turbulence. We consider the case of terrestrial imaging over long ranges with a wide field-of-view. This produces an anisoplanatic imaging scenario… read more here.
Keywords: turbulence; turbulence mitigation; optical turbulence; cnn ... See more keywords
Application of tilt correlation statistics to anisoplanatic optical turbulence modeling and mitigation.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.418458
Abstract: Atmospheric optical turbulence can be a significant source of image degradation, particularly in long range imaging applications. Many turbulence mitigation algorithms rely on an optical transfer function (OTF) model that includes the Fried parameter. We… read more here.
Keywords: modeling mitigation; turbulence; otf model; turbulence modeling ... See more keywords
Scene motion detection in imagery with anisoplanatic optical turbulence using a tilt-variance-based Gaussian mixture model.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.424181
Abstract: In long-range imaging applications, anisoplanatic atmospheric optical turbulence imparts spatially- and temporally varying blur and geometric distortions in acquired imagery. The ability to distinguish true scene motion from turbulence warping is important for many image-processing… read more here.
Keywords: anisoplanatic optical; turbulence; motion; scene motion ... See more keywords
Underwater imaging in optical turbulence: average temperature and salinity effects.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.435484
Abstract: Classic imaging systems may experience deleterious effects of optical turbulence, leading to their quality degradation induced by image jitter and blur. Using a recently introduced model for the refractive index power spectrum of natural water… read more here.
Keywords: turbulence; average temperature; underwater imaging; optical turbulence ... See more keywords
Absorption, scattering, and optical turbulence in natural waters.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.454423
Abstract: The Beer-Lambert-Bouguer law characterizes attenuation of an optical plane wave resolved in terms of absorption and scattering of a medium it passes through. However, the optical turbulence present in a medium may also cause severe… read more here.
Keywords: absorption scattering; optical turbulence; scattering optical; turbulence ... See more keywords
Estimation of atmospheric optical turbulence strength in realistic airborne environments.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.459461
Abstract: In this paper, atmospheric optical turbulence strength is estimated for realistic airborne environments using a modified phase-variance approach, as well as a modified slope-discrepancy approach. Realistic airborne environments are generated using wave-optics simulations of a… read more here.
Keywords: optical turbulence; atmospheric optical; turbulence strength; airborne environments ... See more keywords
Atmospheric optical turbulence mitigation using iterative image registration and least squares lucky look fusion.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.467958
Abstract: This paper presents an atmospheric optical turbulence mitigation method that uses a sequence of short-exposure frames. An iterative block matching registration method is proposed for image dewarping. The dewarped frames are combined in a least… read more here.
Keywords: turbulence mitigation; squares lucky; optical turbulence; atmospheric optical ... See more keywords
Determination of the optical turbulence parameters from the adaptive optics telemetry: critical analysis and on-sky validation.
Sign Up to like & getrecommendations! Published in 2018 at "Applied optics"
DOI: 10.1364/ao.57.007837
Abstract: It has been demonstrated by several authors that the optical turbulence parameters associated with a given adaptive optics (AO) run-the seeing angle and outer scale-can be determined from a statistical analysis of the commands of… read more here.
Keywords: optical turbulence; determination; optics; adaptive optics ... See more keywords
Demonstrating 24-hour continuous vertical monitoring of atmospheric optical turbulence.
Sign Up to like & getrecommendations! Published in 2023 at "Optics express"
DOI: 10.1364/oe.479544
Abstract: We report what is believed to be the first example of fully continuous, 24-hour vertical monitoring of atmospheric optical turbulence. This is achieved using a novel instrument, the 24-hour Shack-Hartmann Image Motion Monitor (24hSHIMM). Optical… read more here.
Keywords: optical turbulence; atmospheric optical; turbulence; monitoring atmospheric ... See more keywords