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Author: search.filters.author.Samavati, A. R.Has files: No

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    Fast light generation using GaAlAs/GaAs waveguide
    (2012-12-01)
    Afroozeh, A.
    ;
    Bahadoran, M.
    ;
    Amiri, I. S.
    ;
    Samavati, A. R.
    ;
    Ali, J.
    Generation of fast light pulses through a nonlinear microring system is an attractive research challenge for high speed optical and quantum computer, optical communication networks and secured communication. In this paper generation of fast light through GaAlAs/GaAs waveguides with fabricated Micro Ring Resonator is reported. Using multistage system, the attosecond pulse can be generated. Simulation results obtained have shown that the generation of a very narrow full-width at half maximum (FWHM) line width and sharp tip is achieved. We propose a new system of multistage micro ring resonators consist of four rings for optical communication system. Here, pulse width of 15 attosecond can be obtained, using proper parameters of the proposed system. © Penerbit UTM Press, Universiti Teknologi Malaysia.
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    THz frequency generation using MRRs for THz imaging
    (2012-03-15)
    Afroozeh, A.
    ;
    Amiri, I. S.
    ;
    Samavati, A. R.
    ;
    Ali, J.
    ;
    Yupapin, Preecha
    We propose a new design of THz frequency carrier generation for medical applications. The dense wavelength division multiplexing can be generated by using a Gaussian pulse propagating within a modified PANDA ring resonator and Add/drop filter. Results obtained have shown that region of frequency can be obtained between 30-100 THz. This area of frequency band can be used for medical applications. The broad bandwidth of THz signals can be obtained and available for medical applications, for instance, Terahertz pulsed imaging (TPI). THz imaging for histopathological diagnosis has been successful investigated method, where THz waves are useful for analysis of the histological features, without any painful process. It has been confirmed that the THz radiations have different transmittance through healthy tissues, where the tissues effected by cancer [1, 2]. © 2012 IEEE.