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    Item type:Publication,
    Proposed nano-scale sensing transducer using nano-waveguide for dynamic measurement applications
    (2009-01-01) ;
    Fujii, Yusaku
    ;
    Chaiyachet, Panuwat
    ;
    Yupapin, Preecha P.
    We propose a new concept of a nano-sensing transducer system using a nano-waveguide. The small change in physical quantity affects to the change in device parameters such as refractive index or length which is relatively absorbed and observed by the resonant signal. In principle, the stored light pulse at the specified wavelength is generated by using a soliton propagating within the input ring resonators, whereas a resonant signal can be stored within the nano-waveguide, i.e. a transducer, which is formed the sensing ring device. The induced change in the resonant signal is occurred, and can be detected by using the wavelength domain detector (optical spectrum analyzer). Such a proposed device is suitable to perform the measurements in the nano-scale regime such as force, stress and temperature. © 2009 Elsevier B.V. All rights reserved.
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    Item type:Publication,
    Novel dark-bright optical solitons conversion system and power amplification
    (2009-12-01)
    Sarapat, Khuntong
    ;
    Sangwara, Narong
    ;
    ;
    Yupapin, Preecha P.
    ;
    Pornsuwancharoen, Nithiroth
    We propose a new system of the dark-bright solitons conversion using a micro- and nanoring resonators incorporating an optical add/drop filter, where the add/drop filter can be used to convert the dark soliton to a bright soliton. The key advantage of the system is that the detection of the dark soliton pulse is normally difficult due to the low level of input power. First, a dark soliton pulse is input into a microring resonator and then propagated into smaller micro- and nanoring resonators, respectively. Second, the add/drop filter is applied (connected) into the ring system, where the bright and dark solitons are obtained via the drop and through (or throughput) 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 power to use in the transmission link. Thus, significant conversion-amplified signals can be achieved. © 2009 Society of Photo-Optical Instrumentation Engineers.