Dr. Ljuan Ljubomirov Gurdev Profile

Dr. Ljuan Ljubomirov Gurdev

Assoc. Professor at Institute of Electronics

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Author

Publications (23)

Proceedings Article | 29 January 2019 Paper

Lidar and contact investigations of aerosol characteristics near high traffic urban sites

Ralitsa Angelova, Lyubomir Slavov, Georgi Kolarov, Ivan Grigorov, Chavdar Ghelev, Ljuan Gurdev, Ivan Nedkov, Dimitar Stoyanov

Proceedings Volume 11047, 1104713 (2019) https://doi.org/10.1117/12.2517934

KEYWORDS: Aerosols, Atmospheric particles, LIDAR, Visualization, Biological research, Backscatter, Calibration, Chemical analysis, Error analysis

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Proceedings Article | 29 January 2019 Paper

Elastic-lidar signal statistics and sensing efficiency depending on the laser radiation wavelength

Tsvetina Evgenieva, Vladimir Anguelov, Ljuan Gurdev

Proceedings Volume 11047, 1104716 (2019) https://doi.org/10.1117/12.2516532

KEYWORDS: LIDAR, Signal to noise ratio, Atmospheric modeling, Atmospheric particles, Atmospheric optics, Near infrared, Aerosols, Atmospheric sensing, Backscatter, Signal detection

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Proceedings Article | 5 January 2017 Paper

Optimal contrast elastic lidar sensing of clear and aerosol-loaded atmosphere

Tsvetina Evgenieva, Ljuan Gurdev

Proceedings Volume 10226, 102260Z (2017) https://doi.org/10.1117/12.2261413

KEYWORDS: LIDAR, Signal to noise ratio, Clouds, Atmospheric particles, Atmospheric sensing, Atmospheric modeling, Aerosols, Atmospheric optics, Scattering, Laser scattering

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Proceedings Article | 5 January 2017 Paper

Spatial intensity distribution of the radiative return from scattering media irradiated by a cw laser beam

Ljuan Gurdev, Tanja Dreischuh, Orlin Vankov, Eleonora Toncheva, Lachezar Avramov, Dimitar Stoyanov

Proceedings Volume 10226, 102261B (2017) https://doi.org/10.1117/12.2261412

KEYWORDS: Scattering media, Continuous wave operation, Tissues, Scattering, Laser scattering, Anisotropy, Light scattering, Collimation, Laser therapeutics, Absorption

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Proceedings Article | 8 January 2015 Paper

Total attenuation coefficient of intralipid dilutions for discrete laser wavelengths between 405 and 1315 nm

Tanja Dreischuh, Ljuan Gurdev, Orlin Vankov, Lachezar Avramov, Dimitar Stoyanov

Proceedings Volume 9447, 944710 (2015) https://doi.org/10.1117/12.2087266

KEYWORDS: Scattering, Tissues, Mass attenuation coefficient, Tissue optics, Signal attenuation, Laser scattering, Optical properties, Absorption, Diagnostics, Liquids

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Proceedings Article | 8 January 2015 Paper

Considerations about the lognormality of the aerosol lidar signal fluctuations

Ljuan Gurdev, Tanja Dreischuh, Zahary Peshev, Dimitar Stoyanov

Proceedings Volume 9447, 94470S (2015) https://doi.org/10.1117/12.2178247

KEYWORDS: LIDAR, Aerosols, Atmospheric particles, Scattering, Atmospheric sensing, Statistical analysis, Laser scattering, Turbulence, Atmospheric optics, Particles

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Proceedings Article | 8 January 2015 Paper

Finite system response shape due distortions of the temperature and density profiles in fusion plasmas recovered using Thomson scattering lidar

Ljuan Gurdev, Tanja Dreischuh, Dimitar Stoyanov

Proceedings Volume 9447, 94470T (2015) https://doi.org/10.1117/12.2175642

KEYWORDS: LIDAR, Tellurium, Plasmas, Convolution, Thomson scattering, Deconvolution, Signal to noise ratio, Shape analysis, Pulsed laser operation, Photon counting

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Proceedings Article | 15 March 2013 Paper

Efficiency of determining electron temperature and concentration in thermonuclear plasmas by Thomson scattering lidar

Tanja Dreischuh, Ljuan Gurdev, Dimitar Stoyanov

Proceedings Volume 8770, 877012 (2013) https://doi.org/10.1117/12.2014282

KEYWORDS: Tellurium, LIDAR, Error analysis, Plasmas, Thomson scattering, Signal to noise ratio, Statistical analysis, Monte Carlo methods, Computer simulations, Photon counting

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Proceedings Article | 18 January 2011 Paper

A dual interpretation of experimental data concerning the propagation of laser light through tissue-like turbid media

I. Bliznakova, L. Gurdev, T. Dreischuh, O. Vankov, D. Stoyanov, L. Avramov

Proceedings Volume 7747, 774710 (2011) https://doi.org/10.1117/12.881697

KEYWORDS: Tissue optics, Tissues, Scattering, Laser beam propagation, Laser tissue interaction, Radiative transfer, Absorption, Receivers, Statistical analysis, Laser optics

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Proceedings Article | 18 January 2011 Paper

Statistical modeling of deconvolution procedures for improving the resolution of measuring electron temperature profiles in tokamak plasmas by Thomson scattering lidar

Tanja Dreischuh, Ljuan Gurdev, Dimitar Stoyanov

Proceedings Volume 7747, 77470T (2011) https://doi.org/10.1117/12.885881

KEYWORDS: LIDAR, Plasmas, Deconvolution, Tellurium, Pulsed laser operation, Electronics, Thomson scattering, Picosecond phenomena, Signal to noise ratio, Digital filtering

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Proceedings Article | 19 December 2008 Paper

Potential accuracies of some new approaches for determination by Thomson scattering lidar of the electron temperature profiles in thermonuclear plasmas

Ljuan Gurdev, Tanja Dreischuh, Dimitar Stoyanov

Proceedings Volume 7027, 702711 (2008) https://doi.org/10.1117/12.822512

KEYWORDS: Tellurium, LIDAR, Plasmas, Signal to noise ratio, Error analysis, Photodetectors, Photon counting, Thomson scattering, Signal detection, Monte Carlo methods

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Proceedings Article | 5 March 2007 Paper

Application of a lidar-type gamma-ray tomography approach for detection and identification of buried plastic landmines

Tanja Dreischuh, Ljuan Gurdev, Dimitar Stoyanov, Christo Protochristov, Orlin Vankov

Proceedings Volume 6604, 660420 (2007) https://doi.org/10.1117/12.727122

KEYWORDS: Photons, Land mines, Gamma radiation, Backscatter, Mining, Tomography, Signal attenuation, Explosives, Time metrology, Sensors

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Proceedings Article | 5 March 2007 Paper

Potentialities of lidar-type single-sided optical tomography of tissues

Ljuan Gurdev, Tanja Dreischuh, Dimitar Stoyanov

Proceedings Volume 6604, 66042I (2007) https://doi.org/10.1117/12.727718

KEYWORDS: Tissues, Breast, Signal attenuation, Optical tomography, LIDAR, Signal detection, In vivo imaging, Scattering, Picosecond phenomena, Backscatter

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Proceedings Article | 22 April 2005 Paper

Modeling coherent Doppler lidar sensing of turbulent atmosphere

Ljuan Gurdev, Tanja Dreischuh

Proceedings Volume 5830, (2005) https://doi.org/10.1117/12.618863

KEYWORDS: Doppler effect, LIDAR, Atmospheric modeling, Atmospheric sensing, Statistical analysis, Heterodyning, Time metrology, Motion models, Atmospheric sciences, Statistical modeling

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Proceedings Article | 4 November 2003 Paper

An heuristic view on the signal-to-noise ratio at coherent heterodyne detection of aerosol lidar returns formed through turbulent atmosphere

Luan Gurdev, Tanja Dreischuh

Proceedings Volume 5226, (2003) https://doi.org/10.1117/12.519507

KEYWORDS: LIDAR, Signal to noise ratio, Heterodyning, Atmospheric particles, Atmospheric sensing, Signal detection, Aerosols, Promethium, Scattering, Turbulence

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Proceedings Article | 4 November 2003 Paper

The determination by coherent lidar of Doppler-velocity profiles in turbulent atmosphere

Luan Gurdev, Tanja Dreischuh

Proceedings Volume 5226, (2003) https://doi.org/10.1117/12.519505

KEYWORDS: Doppler effect, LIDAR, Heterodyning, Atmospheric particles, Atmospheric sciences, Aerosols, Statistical analysis, Algorithm development, Pulsed laser operation, Signal processing

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Proceedings Article | 9 April 2001 Paper

Retrieving high-resolution Doppler velocity profiles in 10.6-um and 2-um coherent lidars

Tanja Dreischuh, Luan Gurdev, Dimitar Stoyanov

Proceedings Volume 4397, (2001) https://doi.org/10.1117/12.425188

KEYWORDS: Doppler effect, LIDAR, Speckle, Pulsed laser operation, Heterodyning, Signal detection, Atmospheric particles, Signal to noise ratio, Laser applications, Laser cutting

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Proceedings Article | 9 April 2001 Paper

Limitation of the lidar angular resolution caused by the atmospheric turbulence and the lidar telescope aberrations

Georgi Kolarov, Luan Gurdev, Ivan Grigorov, Atanaska Deleva

Proceedings Volume 4397, (2001) https://doi.org/10.1117/12.425193

KEYWORDS: LIDAR, Atmospheric optics, Spatial resolution, Turbulence, Optical transfer functions, Objectives, Telescopes, Optical resolution, Image quality, Atmospheric turbulence

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Proceedings Article | 9 April 2001 Paper

Investigation and analysis of nonlinear Hanle effect signal in HeI

Emilia Alipieva, Elena Taskova, Luan Gurdev, Tanja Dreischuh

Proceedings Volume 4397, (2001) https://doi.org/10.1117/12.425124

KEYWORDS: Magnetism, Signal detection, Absorption, Signal to noise ratio, Nonlinear optics, Polarization, Shape analysis, Interference (communication), Luminescence, Correlation function

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SPIE Journal Paper | 1 June 2000

Lidar profiling by long rectangular-like chopped laser pulses

Dimitar Stoyanov, Luan Gurdev, Georgi Kolarov, Orlin Vankov

OE, Vol. 39, Issue 06, (June 2000) https://doi.org/10.1117/12.10.1117/1.602529

KEYWORDS: LIDAR, Signal to noise ratio, Pulsed laser operation, Profiling, Modulation, Algorithm development, Receivers, Signal processing, Continuous wave operation, Optical engineering

Proceedings Article | 7 May 1999 Paper

Comparison between two approaches for improving the resolution of Doppler-velocity coherent-lidar profiles

Tanja Dreischuh, Luan Gurdev, Dimitar Stoyanov

Proceedings Volume 3571, (1999) https://doi.org/10.1117/12.347633

KEYWORDS: Doppler effect, LIDAR, Spatial resolution, Temporal resolution, Pulsed laser operation, Computer simulations, Aerosols, Statistical analysis, Heterodyning, Algorithm development

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Proceedings Article | 7 May 1999 Paper

Possibility of measuring wind velocity by spatial filtration of laser radiation propagating through the atmosphere

Luan Gurdev, Georgi Kolarov, Ivan Grigorov

Proceedings Volume 3571, (1999) https://doi.org/10.1117/12.347629

KEYWORDS: Atmospheric propagation, Silicon, Laser beam propagation, Speckle, Spatial filters, Photodetectors, Palladium, Neodymium, Atmospheric sensing, Atmospheric physics

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Proceedings Article | 27 December 1996 Paper

Deconvolution algorithms for improving the resolution of exponentially shaped pulse lidars

Luan Gurdev, Tanja Dreischuh, Dimitar Stoyanov

Proceedings Volume 3052, (1996) https://doi.org/10.1117/12.262946

KEYWORDS: Deconvolution, LIDAR, Pulsed laser operation, Signal to noise ratio, Atmospheric sensing, Chlorine, Algorithm development, Fourier transforms, Picosecond phenomena, Atmospheric laser remote sensing

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Showing 5 of 23 publications

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