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Author: search.filters.author.Mitatha, S.Subject: search.filters.subject.Nano-waveguide

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    Dark-bright optical solitons conversion via an optical add/drop filter for signals and networks security applications
    (2010-10-01)
    Knobnob, B.
    ;
    Mitatha, S.
    ;
    Dejhan, K.
    ;
    Chaiyasoonthorn, S.
    ;
    Yupapin, P. P.
    We propose a new system of the darkbright solitons conversion using a micro- and nano-ring resonators incorporating an optical add/drop filter, where the add/drop filter can be used to convert the dark soliton to bright soliton. The key advantage of the system is that the detection of the dark soliton pulse is normally difficult due to low level of input power. Firstly, a dark soliton pulse is input into a micro-ring resonator, then propagating into smaller micro- and nano-ring resonators. Secondly, the add/drop filter is applied (connected) into the ring system, where the bright and the dark solitons are obtained via the drop and through (or throughput) the ports of the add/drop filter, respectively. The results obtained have shown that the detected soliton power can be controlled by the input soliton power and the ring resonator coupling coefficient, which is enough to use in the transmission link. The optical and the quantum networks using dark soliton are also discussed. © 2009 Elsevier GmbH. All rights reserved.
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    Novel continuous spectrum generation system using a nano-waveguide for white light, short and sub-millimeter waves use
    (2009-10-01)
    Mitatha, S.
    ;
    Yupapin, P. P.
    We propose a novel system of a nano-waveguide that can be used to generate the continuous spectrum, that is, white light. The simultaneous generation of short and sub-millimeter waves can also be generated by using either dark or bright soliton schemes. A system consists of two microring and a nanoring resonators that can be integrated into a single system. The large bandwidth is generated by a soliton pulse within a Kerr type nonlinear medium where the continuous bandwidth or wavelength can be performed. Results of the bright soliton obtained have shown the potential of using the technique for white light source generation and detection, which is discussed. The simultaneous generation of short and millimeter waves using dark soliton is also proposed. The advantage is that the large bandwidth separation of the short and sub-millimeter waves can be obtained, which is allowed the simultaneous generation of short and millimeter waves. © 2009 Wiley Periodicals, Inc.