American Journal of Optics and Photonics

Archive

Volume 3, Issue 1, February 2015

  • Parametric Characterization of Truncated Circular Flattened Gaussian Beams

    Redouane Lamsoudi, Mohammed Ibn Chaikh

    Issue: Volume 3, Issue 1, February 2015
    Pages: 1-4
    Received: 27 May 2015
    Accepted: 15 June 2015
    Published: 2 July 2015
    DOI: 10.11648/j.ajop.20150301.11
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    Abstract: Based on the truncated second-order moments definition, the generalized factor of the circular flattened Gaussian beams (CFGB) in the cylindrical coordinate system through a hard-edged circular aperture is derived. Three special cases have been obtained from the closed-form expression for the generalized factor of the truncated CFGB, the non-trunca... Show More
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  • Performance Analysis of Coherent Optical OFDM Applied to UAV Mobile FSO Systems

    Konstantinos Eleftherios Zarganis, Antonis Hatziefremidis

    Issue: Volume 3, Issue 1, February 2015
    Pages: 5-12
    Received: 2 June 2015
    Accepted: 15 June 2015
    Published: 2 July 2015
    DOI: 10.11648/j.ajop.20150301.12
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    Abstract: The Free Space Optical (FSO) communication links is a promising and cost-effective solution for the provision of high data rate point to point communications. Due to their huge bandwidth, license free spectrum and multipath fading mitigation, the FSO links combined with Orthogonal Frequency Division Multiplexing (OFDM) modulation technique provide ... Show More
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  • Study of the Electrons Density in the Base of the Parallel Vertical Junction Solar Cell Under the Influence of the Temperature

    Nfally Dieme

    Issue: Volume 3, Issue 1, February 2015
    Pages: 13-16
    Received: 10 July 2015
    Accepted: 22 July 2015
    Published: 29 July 2015
    DOI: 10.11648/j.ajop.20150301.13
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    Abstract: This work is a theoretical study of a parallel vertical junction solar cell under multispectral illumination in static regime. The expression for the density of the minority carriers in excess (electrons) in the base is determined from the equation of continuity. It's an equation that takes into account the process of generation of the charge carri... Show More
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  • Population Inversion and X-Ray Laser Gain by Electron Impact Excitation of Ni-Like Tin

    Mahmoud Ahmad, Ahmed Abou El-Maaref, Essam Abdel-Wahab, Sami Allam

    Issue: Volume 3, Issue 1, February 2015
    Pages: 17-23
    Received: 11 July 2015
    Accepted: 22 July 2015
    Published: 30 July 2015
    DOI: 10.11648/j.ajop.20150301.14
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    Abstract: Excitation energies and transition probabilities for the 1s22s22p63s23p63d10, and the 1s22s22p63s23p63d94l (l= s, p, d, and f) configurations in nickel-like tin have been used to calculate the reduced population of 99 fine structure levels over a wide range of electron densities and at different electron plasma temperatures. The gain coefficients ... Show More
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