Journal ArticleDOI
Variable-reflectance thin-film polarization-independent beam splitters for 0.6328- and 10.6-microm laser light.
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TLDR
These truly polarization-independent beam splitters for 0.6328- and 10.6-microm laser radiation are designed using single-layer-coated (Cleartran) ZnS and Ge prisms and are found to be reasonably achromatic.Abstract:
Truly polarization-independent beam splitters for 0.6328- and 10.6-microm (He-Ne and CO(2)) laser radiation are designed using single-layer-coated (Cleartran) ZnS and Ge prisms. These devices are found to be reasonably achromatic, their reflectance (beam-splitting ratio) can be varied over a wide range with little accompanying polarization error, and they are tolerent to small film-thickness and film refractive-index errors.read more
Citations
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I–K distribution as a universal propagation model of laser beams in atmospheric turbulence
TL;DR: In this article, a new propagation model is developed for the intensity fluctuations of a laser beam propagating through extended clear-air turbulence, where the field of the optical wave is modeled as the sum of a coherent component and a random component, the intensity of which is assumed governed by the generalized n distribution of Nakagami.
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Probability density of irradiance scintillations for strong path-integrated refractive turbulence
TL;DR: In this article, a new probability density function (PDF) was proposed for irradiance scintillations in the case of strong scintillation (i.e., irradiance variance decreases with further increases in path-averaged refractive-index turbulence).
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Weak-scatterer generalization of the K-density function with application to laser scattering in atmospheric turbulence
TL;DR: In this paper, a generalization in which the phases are nonuniformly distributed (weak-scatterer regime) but the multipaths are still governed by the negative binomial distribution is presented.
Journal ArticleDOI
Propagation of electromagnetic waves through a turbulent atmosphere
TL;DR: A review of the major advances achieved in the studies of EM wave propagation in turbulent media can be found in this paper, where the theoretical results of this treatise include: the path integration technique, the predominant correlation method, the two-scale method, hybrid approach to scattering from small inhomogeneities in the presence of large ones, the theory of coherent channels in backscattering, and the concept of partially determinate processes and fields.
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Mathematical genesis of the I–K distribution for random optical fields
TL;DR: In this article, the I-K distribution and its connection with other distributions is examined in the context of optical waves scattered by a turbulent medium, where the authors show how the I−K distribution, K distribution, and homodyned K distribution all evolve as marginal density functions from compound or doubly stochastic Gaussian optical fields.
References
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Characterization of optical thin films
TL;DR: In this article, various properties of dielectric thin films are discussed, including refractive index and absorption coefficient, light scattering, structure, microstructure, density, gas sorption, chemical composition, homogeneity, adhesion, hardness and mechanical stress, and environmental influences.
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Refractive Indices of Infrared Optical Materials and Color Correction of Infrared Lenses
TL;DR: In this paper, the interpolation formula for computing the dispersion of glass has been appropriately modified and applied to infrared materials, and the results for 14 optical materials that are suitable for practical refracting systems have been fitted by the modified formula and tabulated at increments of 0.5 μ for the useful transmittance range of each material.
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Refractive indices of zinc sulfide in the 0.405–13-μm wavelength range
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Nonpolarizing interference films inside a glass cube.
TL;DR: Another method using quarter-wave layers only is developed for the reduction of reflectance and transmittance of dielectric films at nonzero angle of incidence.
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Reduction of polarization effects in interference coatings.
TL;DR: A design procedure is developed which yields layer combinations having a polarization independent effective index of refraction and a method of transforming massive media to nonpolarizing effective massive media is shown.