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Subject: search.filters.subject.All optical switching

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    Novel all-optical logic gate using an add/drop filter and intensity switch
    (2011-12-01)
    Threepak, T.
    ;
    Mitatha, S.
    ;
    Yupapin, P. P.
    A novel design of all-optical logic device is proposed. An all-optical logic device system composes of an optical intensity switch and add/drop filter. The intensity switch is formed to switch signal by using the relationship between refraction angle and signal intensity. In operation, two input signals are coupled into one with some coupling loss and attenuation, in which the combination of add/drop with intensity switch produces the optical logic gate. The advantage is that the proposed device can operate the high speed logic function. Moreover, it uses low power consumption. Furthermore, by using the extremely small component, this design can be put into a single chip. Finally, we have successfully produced the all-optical logic gate that can generate the accurate AND and NOT operation results. Copyright © 2011 American Scientific Publishers All rights reserved.
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    Photon switching using nonlinear PANDA ring resonetor
    (2011-05-02)
    Songmuang, S.
    ;
    Punthawanunt, S.
    ;
    Mitatha, S.
    ;
    Yupapin, P. P.
    We propose a new system of an all optical switching system using an optical add/drop filter consisting of two nano ring resonators. The dynamic behavior of dark-bright soliton collision within the modified add/drop optical filter device, which it is known as PANDA ring resonator. By using the dark-bright soliton conversion control within the PANDA ring, the obtained output signals can be attenuated and used to perform the single photon switching, which is capable for security code application. Results obtained have shown that the random binary codes based on a single photon switching can be formed by using the polarized light components, dark and bright solitons, whereas the single photon switching codes can be obtained by using the attenuated dark-bright soliton conversion signals output signals.