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All optical logic NAND gate using dark-bright soliton conversion control
(2012-11-12)
Soysouvanh, Saysamone
;
Phongsanam, Prapas
;
Luangxaysana, Khanthanou
;
Mitatha, Somsak
;
Noriyuki, Komine
In this paper, we present a new concept of all-optical gates using Dark-Bright soliton conversion behaviors within a modified add/drop filter. The soliton can be used to generate logic data "1" and "0" using for optical gates. We have designed a photonic circuit for all-optical logic NAND Gate using dark-bright soliton conversion control within an optical add-drop multiplexer. The input and control logic ̀0', ̀1' are represented by dark (D) and bright (B) soliton pulses, respectively. We found that the simultaneous optical logic NAND Gate at the through port can be performed.
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THz switching generation using a PANDA ring resonator for high speed computer communication
(2012-11-12)
Punthawanunt, Suphanchai
;
Soysouvanh, Saysamone
;
Luangxaysana, Khanthanou
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Mitatha, Somsak
;
Yoshida, Masahiro
A novel design of Terahertz (THz) switching generation for high speed computer used is proposed. The dense wavelength division multiplexing (DWDM) can be obtained by using a Gaussian or Soliton pluses propagating within a modified add-drop filter know as a PANDA ring resonator. The THz devices can made contributions to promising applications in high-speed switching, demultiplexing, and wavelength conversion of optical signals. Effective THz control is also essential for the potential application to ultrahigh-speed wireless digital interconnects for computer chips of the ultrahigh clock rates (> 10 GHz). In principle, the high density frequency (wavelength) can be generated and used to form the radio frequency identification (RFID), Ad-Hoc network and ubiquitous applications, moreover, the tiny device system is the another advantage, which can be constructed incorporating the available currently used system. In this paper is organized as follow: introduction, theory and the use of such a system in all proposed applications.
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High capacity frequency comb generated by a PANDA ring resonator
(2012-10-02)
Luangxaysana, Khanthanou
;
Yoshida, Masahiro
;
Komine, Noriyuki
;
Phongsanam, Prapas
;
Mitatha, Somsak
This paper we propose a new system design for optical frequency comb generator (OFCG) using PANDA ring resonator over terahertz span. This scheme can be generated high capacity frequency comb signal tens to hundreds of frequencies by using a Dark-Bright soliton pulse driven, so that we can obtain high capacity comb signal at the through and drop port, respectively. Our system can tune the rate and pulse width by driving signal or the ring parameter. In application, the proposed scheme can be recognized as a simple flexible and more stable for apply in advance circuit system. © 2012 IEEE.
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High-capacity terahertz carrier generation using a modified add-drop filter for radio frequency identification
(2012-08-01)
Luangxaysana, Khanthanou
;
Mitatha, Somsak
;
Yoshida, Masahiro
;
Komine, Noriyuki
;
Yupapin, Preecha
A new technique of terahertz (THz) frequency carrier generation for multi-channel radio frequency identification (RFID) use is proposed. The dense wavelength division multiplexing signals can be obtained by using a Gaussian pulse propagating within a modified add-drop filter known as a PANDA ring resonator. The THz device system can be made contributions to the promising applications, especially in highspeed switching, demultiplexing, and wavelength conversion of optical signals, in which the effect of THz control is also required and essential for the potential application to ultra-high speed wireless digital interconnects for computer chips with ultra-high clock rates. In principle, the high-density frequency (wavelength) can be generated and used to form the RFID; moreover, the tiny device system is another advantage, which can be constructed to incorporate the currently used system. The results obtained have shown that higher density and increasing channel capacity can be obtained and are useful for the large demand for RFID applications. © 2012 Society of Photo-Optical Instrumentation Engineers (SPIE).
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Novel soliton cryptography using optical key generated by orthogonal dark-bright soliton pair
(2012-08-01)
Louangvilay, Xaythavy
;
Mitatha, Somsak
;
Yoshida, Masahiro
;
Komine, Noriyuki
;
Yupapin, Preecha P.
A new method of optical cryptography using dark-bright soliton conversion control within a modified add/drop optical filter is proposed. A pair of optical keys is randomly generated and transmitted into the transmission line, where finally the corrected keys between Alice (sender) and Bob (receiver) can be retrieved. In principle, the coincidence (orthogonal) dark-bright soliton pair has shown promising behaviors, especially when they propagate into the π/2 phase shifter, i.e. beamsplitter, the shift in phase of π/2 between dark and bright solitons is occurred and separated. Such behaviors can be used to form the orthogonal light modes (solitons), which are useful for cryptographic application, where in this case the longdistance cryptography can be easily managed. We have derived and presented a new concept of multi-orthogonal solitons generated by using dark-bright soliton pulses within the modified add/drop optical filter, which is known as a PANDA ring resonator. By using the dark-bright soliton conversion control, the obtained output of the dynamic states can be used to randomly form the multi-orthogonal soliton pairs, which can be available for computer and communication security applications, especially for long-distance link. © 2012 Society of Photo-Optical Instrumentation Engineers (SPIE).
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A high-voltage generator with a VDC for TFT-LCDs
(2001-12-01)
Hayashi, Kentaro
;
Suzuki, Yasoji
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Yoshida, Masahiro
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Thanachayanont, Apinunt
;
Imai, Shigeki
A high-voltage generator using a charge pumping circuit for TFT-LCD drivers has been already presented in IDW '99. The generator has a week point that the output voltage decreases as the driving output current increases. To solve this problem, a new high-voltage generator is proposed in this paper. The generator is composed of a charge pumping circuit and a VDC (Voltage Down Converter). The operating characteristics of the generator are also examined by using HSPICE in detail. And, it is demonstrated that the proposed generator can provide stable voltage for TFT-LCD drivers even at driving output current larger than 5mA.
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New bias voltage generators for TFT-LCD's drivers
(2000-01-01)
Hirata, Manabu
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Suzuki, Yasoji
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Yoshida, Masahiro
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Arayashiki, Yutaka
;
Teramoto, Mitsuo
New positive and negative bias voltage generators for TFT-LCD's drivers utilizing charge pump circuits are introduced. The generators can generate positive or negative voltages with various amplitude by simply changing the number of pumping stages. By using the circuit simulation program HSPICE, it is demonstrated that the introduced generators can provide enough positive or negative voltages for TFT-LCD's drivers.

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