A path-averaged Gabitov-Turitsyn model governing optical signal propagation down the dispersion-managed (DM) transmission line is studied numerically. A different numerical algorithm to find a soliton solution for an arbitrary periodic DM system is proposed. Applying developed technique we analyze soliton solutions for few important practical systems.
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http://dx.doi.org/10.1103/PhysRevE.66.066607 | DOI Listing |
J Opt Soc Am A Opt Image Sci Vis
June 2024
The United States Naval Academy long-term scintillation measurement campaign was a multi-year effort to characterize optical turbulence in the near-maritime atmospheric boundary layer (ABL). At its core, the field experiment consists of in situ measurements of bulk atmospheric and oceanographic parameters, as well as path-averaged measurements of the refractive index structure parameter, 2, collected using a large-aperture scintillometer. The field experiment ran from January 1st, 2020, through September 26th, 2023, representing the most comprehensive collection of optical turbulence measurements in the near-maritime ABL to date.
View Article and Find Full Text PDFSci Rep
January 2024
Shell Global Solutions International B.V., Grasweg 31, 1031, Amsterdam, The Netherlands.
A method for methane emissions monitoring at industrial facility level was developed based on a high precision multi-open-path laser dispersion spectrometer combined with Bayesian analysis algorithms using Monte Carlo Markov Chain (MCMC) inference. From the methane path-averaged concentrations spatially distributed over the facility under study, together with the wind vector, the analysis allows detection, localization and quantification of fugitive methane emissions. This paper describes the very first long term (3 months), continuous (24 h/7 days) deployment of this monitoring system at an operational gas processing and distribution facility.
View Article and Find Full Text PDFThe path-averaged model is applied to described soliton characteristics in the anomalous cavity dispersion fiber laser with semiconductor optical amplifier. It is shown that, by off-setting the optical filter relative to the gain spectral maximum, it is possible to control velocity and frequency of both the fundamental optical soliton and chirped dissipative solitons.
View Article and Find Full Text PDFImages captured from a long distance suffer from dynamic image distortion due to turbulent flow of air cells with random temperatures, and thus refractive indices. This phenomenon, known as image dancing, is commonly characterized by its refractive-index structure constant 2 as a measure of the turbulence strength. For many applications such as atmospheric forecast model, long-range/astronomy imaging, and aviation safety, optical communication technology, 2 estimation is critical for accurately sensing the turbulent environment.
View Article and Find Full Text PDFIndoor Air
July 2020
Pennsylvania State University, University Park, PA, USA.
A new large-field, high-sensitivity, single-mirror coincident schlieren optical instrument has been installed at the Bauhaus-Universität Weimar for the purpose of indoor air research. Its performance is assessed by the non-intrusive measurement of the thermal plume of a heated manikin. The schlieren system produces excellent qualitative images of the manikin's thermal plume and also quantitative data, especially schlieren velocimetry of the plume's velocity field that is derived from the digital cross-correlation analysis of a large time sequence of schlieren images.
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