Threepak, Thanunchai

Preferred name

Alternative Name

Threepak, T.

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School of Engineering

thanunchai.th@kmitl.ac.th

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Quantum cryptography via a wavelength router for internet security
(2010-11-01)
Threepak, T.
;
Mitatha, S.
;
Luangvilay, X.
;
Yupapin, P. P.
We propose a new system of quantum cryptography for internet security using Gaussian pulses propagating within a nonlinear ring resonator system, quantum processor, and a wavelength router. To increase the channel capacity and security, the multiplexer is operated incorporating a quantum processing unit via an optical multiplexer. The transmission part can be used to generate the high capacity quantum codes within the series of microring resonators and an add/drop filter. The receiver part can be communicated by using the quantum key (quantum bit, qubit) via a wavelength router and quantum processors. The reference states can be recognized by using the cloning unit, which is operated by the add/drop filter, where the communication between Alice and Bob can be performed. Results obtained have shown that the correlated photons can be generated and formed the entangled photon pair, which is allowed to form the secret key between Alice and Bob. In application, the embedded system within the computer processing unit is available for quantum computer. Furthermore, such a concept is also available for internet application via hybrid communications, for instance, wire/wireless, satellite, which can be used to form the internet security. © 2010 Wiley Periodicals, Inc.
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New wavelength division multiplexing bands generated by using a Gaussian pulse in a microring resonator system
(2009-12-01)
Polar, A.
;
Threepak, T.
;
Mitatha, S.
;
Bunyatnoparat, P.
;
Yupapin, P. P.
We propose a novel system that can be used to generate the new optical communication bandwidths (wavelength bands) using a Gaussian pulse propagating within a nonlinear microring resonator system. By using the wide range of the Gaussian input pulses, for instance, when the input pulses of the common lasers with center wavelengths from 400-1,400 nm are used. Results obtained have shown that more available wavelength bands from the different center wavelengths can be generated, which can be used to form new dense wavelength division multiplexing bands, whereas the use of the very high channel capacity for personal wavelength and network applications is plausible. ©2009 IEEE.
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Novel quantum-molecular transporter and networking via a wavelength router
(2010-06-01)
Threepak, T.
;
Louangvilay, X.
;
Mitatha, S.
;
Yupapin, P. P.
We propose a new system of a molecular-quantum networking using the optical tweezers, where the transportation of molecules via wavelength router and network can be performed. In addition, the molecule transportation states can be identified by using the quantum states of the transporters, which can be formed in the network. The proposed fabricated material used is InGaAsP/InP, which can provide the required output signals. The design system consists of a nonlinear microring/nanoring resonator system incorporating an add/ drop filter and a wavelength router. The transporter can be formed by the dark soliton, and the optical transporter is tuned and amplified by the bright soliton and transmitted into the network. In applications, the use of the proposed system incorporating a nanoscale communication and networking via wavelength router is available for long-distance link. © 2010 Wiley Periodicals, Inc.
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Dynamic pulse reshaping generation using coherent control for ultra fast switching use
(2010-07-01)
Threepak, Thanunchai
;
Mitatha, Somsak
;
Yupapin, P. P.
In this letter, we present a new technique for pulse shaping, whereas the dynamic pulse reshaping of the dark-bright soliton conversion is investigated and seen during the propagation within an add/drop filter. The dark soliton pulse is reshaped by adjusting bright soliton input, whose dispersions are adjusted to be cancelled. This technique exploits the well known property of the ultrafast pulse in which the desired output can be stored and form in the same manner of the adiabatic light pulse (cold light). This technique presents inherent advantages of fast light pulse, whereas the fast in time of 1 ns is noted. © 2010 Wiley Periodicals, Inc.
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A novel data transmission security via a noisy channel using a microring resonator system
(2010-01-01)
Threepak, T.
;
Mitatha, S.
;
Yupapin, P. P.
A novel encryption methods using microring resonator is presented. By using the proposed system, the confidentiality of information in optical communication can be formed. In this paper, chaostic noise sophisticates irreversible and unpredictable in nonlinear microring resonator that is used as the encrypted function. In our successfully simulation results, the noisy signals/channels created by the microring resonator are combined with the encoded information to protect the man-in-the-middle attacks (decipher). By using the extremely small processing device, the propose design can be easily applied to secure any form of communication in wireless network, mobile communication network and military applications with low power consumption and very high-speed procedures.
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Soliton collision and crosstalk management using a micro-ring resonator System
(2009-12-01)
Tadee, K.
;
Threepak, T.
;
Mitatha, S.
;
Bunyatnoparat, P.
;
Yupapin, P. P.
We present the interesting system that consists of a micro ring resonator system incorporating an add/drop filter. By using the appropriate parameters relating to the practical device. we found that the obtained multisolitons can be benefit the dense wavelength division multiplexing application, whereas the different center wavelengths of the soliton bands can be obtained via the add/drop filter without the collision, which can be used to increase the communication channel capacity in communication network. ©2009 IEEE.
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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.

Threepak, Thanunchai

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