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Ultrafast all-optical ALU operation using a soliton control within the cascaded InGaAsP/InP microring circuits
(2019-02-04)
Soysouvanh, S.
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Phongsanam, P.
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Mitatha, S.
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Ali, J.
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Yupapin, P.
A dark-bright soliton conversion is used to perform the two arithmetic logic unit operations namely adder and subtractor operations. The advantage of the system such as power stability, non-dispersion and the dark-bright soliton phase conversion control can be obtained. The input source into the circuit is the bright soliton pulse, with the pulse width of 35 ps, the peak power at 1.55 µm is 1 mW. By using the dark-bright soliton conversion pair, the generated logic bits can be controlled, and the secure bits can be achieved. The simulation results show the output signal with a minimum loss of only 0.1% with respect to a low input power of 1 mW, and ultra-fast response time of about 1 ps can be achieved. It gives the ultra-high bandwidth of more than 40 Gbits<sup>−1</sup>. The circuit composes six microring resonators made of InGaAsP/InP material with smaller ring radii of 1.5 µm, and the total physical scale of the circuit less than 100 µm<sup>2</sup>.
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Ultra-fast electro-optic switching control using a soliton pulse within a modified add-drop multiplexer
(2018-09-01)
Soysouvanh, S.
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Jalil, M. A.
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Amiri, I. S.
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Ali, J.
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Singh, G.
We have proposed the use of a soliton pulse that propagates within a modified add-drop filter, which is made of a GaAsInP/P material. It is in the form of a Panda-ring resonator, from which a bright/dark soliton pulse is input into a system via an input port. The conversion between bright and dark soliton pulses is introduced at the 3 dB coupler, i.e. the change in phase of π/2. But it is not superimposed each other. The output solitons obtained at the through and drop ports are bight and dark solitons respectively. Both signals can be used to form “ON’ and “OFF” or “1” and “0”, which are useful for the digital bit generation. The switching speed of the system can be improved by employing the two nonlinear side rings. In application, secure output bits can be arranged by using the alternative input solitons or the control ports, where the input bright and dark solitons can be converted into output bits. This means that the output bits can be randomly switched between “1” and “0”, which can be identified by the sender. Moreover, the additional information can be multiplexed via the add port and transmitted in either free space or optical fiber via the whispering gallery mode and through port outputs. Finally, the electro-optic switching can be transferred and the electronic switching by the embedded stacked layers, where the ultrafast switching of light input can lead the ultrafast electrical switching speed. The switching speed of ~ 5 fs and the offset time of ~ 220 fs of the “on” and OFF” are achieved by using the selected ring parameters.
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Optical spins and nano-antenna array for magnetic therapy
(2013-09-09)
Thammawongsa, N.
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Mitatha, S.
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Yupapin, P. P.
Magnetic therapy is an alternative medicine practice involving the use of magnetic fields subjected to certain parts of the body and stimulates healing from a range of health problems. In this paper, an embedded nano-antenna system using the optical spins generated from a particular configuration of microrings (PANDA) is proposed. The orthogonal solitons pairs corresponding to the left-hand and right-hand optical solitons (photons) produced from dark-bright soliton conversion can be simultaneously detected within the system at the output ports. Two possible spin states which are assigned as angular momentum of either +h or-h will be absorbed by an object whenever this set of orthogonal solitons is imparted to the object. Magnetic moments could indeed arise from the intrinsic property of spins. By controlling some important parameters of the system such as soliton input power, coupling coefficients and sizes of rings, output signals from microring resonator system can be tuned and optimized to be used as magnetic therapy array. © 2002-2011 IEEE.
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High-speed impact test using an inertial mass and an optical interferometer
(2013-07-01)
Jin, T.
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Watanabe, K.
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Prayogi, I. A.
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Takita, A.
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Mitatha, S.
A high-speed impact testing method for evaluating mechanical properties of materials is proposed using an inertial mass and a dual beat-frequencies laser Doppler interferometer (DB-LDI). In this method, an inertial mass levitated using an aerostatic linear bearing is made to collide with the material being tested at a high initial velocity. During the collision, the velocity of the mass, which is even higher than the critical velocity (±0.56 m/s) defined by the frequency difference of the Zeeman laser, is accurately measured using the DB-LDI. The position, acceleration, and impact force of the mass are calculated from the measured velocity. Using the proposed method, the mechanical properties of a visco-elastic material under a high-speed impact loading condition can be accurately evaluated. © 2013 AIP Publishing LLC.
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Highly secured optical communication by optical key and identification address
(2013-05-01)
Juleang, P.
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Putthacharoen, R.
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Mitatha, S.
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Yupapin, P. P.
We propose a novel design of optical network system that can be used for optical communication security and receiver identification. The data signal is secured by using both the optical encryption key and optical address of the receiver before transmission, where finally the receiver who has the valid optical decryption key and optical address can decrypt the Ciphertext. In this paper, a PANDA ring resonator, optical add/drop filter and Mach-Zehnder Interferometer are used for the encryption, decryption and identification processes without any electronic control circuit. The encryption and decryption keys are formed by dark-bright soliton propagation within the PANDA ring resonator. Simulation results obtained have shown that the secured optical network can be achieved optically and realized.
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All-optical logic and and or gates generated by dark-bright soliton conversion
(2013-03-01)
Phongsanam, P.
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Teeka, C.
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Jomtarak, R.
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Mitatha, S.
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Yupapin, P. P.
In this paper, a novel system of simultaneous optical logic AND and OR gates using dark-bright soliton conversion within the add/drop optical filter system is proposed. By using the dark-bright soliton conversion concept, the switching output signal response time of ns can be obtained. The input logic <! - no-mfc - >'0'<! - /no-mfc - > and control logic <! - no-mfc - >'0'<! - /no-mfc - > are formed by using the dark soliton pulse (D) trains. We found that the simultaneous optical logic AND and OR gates at the drop and through ports can be formed, respectively. The comparison data of the commercial system is also given, which is shown that the proposed system has the advantage over the commercial ones. © 2012 Elsevier GmbH. All rights reserved.
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Method for acceleration measurement using a laser Doppler interferometer
(2013-01-01)
Jin, T.
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Takita, A.
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Mitatha, S.
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Yupapin, P. P.
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Jia, H. Z.
A novel method for estimating acceleration directly from the digitized waveform of interference signals is proposed based on a laser Doppler interferometer. In this method, a second-order polynomial function is developed, of which the coefficients are calculated by fitting with the time and corresponding order of zero crossings. Acceleration is calculated as the product of the second-order coefficient and the wavelength of a laser. The performance of this method is evaluated by comparing with the zero crossing method (ZCM) and zero crossing fitting method (ZFM) in simulation. The results show that the accuracy of acceleration calculated by using this method is higher than those by using the ZCM and ZFM, particularly when the signal-to-noise ratio is lower than 40 dB. © 2013 IOP Publishing Ltd.
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An optical nano-antenna system design for radio therapeutic use.
(2013-01-01)
Thammawongsa, N.
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Mitatha, S.
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Yupapin, P. P.
This paper proposes a nano-antenna system using the optical spins generated by a PANDA ring resonator for radio therapeutic applications. Initially, the magnetic field is induced by the coupling effects between aluminium plate (Al) and TE and TM light modes. The generated electromagnetic wave radiation is controlled by a soliton power, coupling coefficients, and ring radii within the system, where finally the near field radio wave is transmitted to the required therapeutic target (neural cells). Simulation results have shown that the temperature within the range from 40°C to about 46°C can be controlled and achieved.
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High bit rate data transmission using colored soliton multiplexing system
(2013-01-01)
Phattaraworamet, T.
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Mitatha, S.
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Visessamit, J.
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Yupapin, P. P.
This paper presents the use of multi-wavelength solitons (colored solitons) generated by light in a modified add-drop optical filter. It is made by InGaAsP/InP and known as a PANDA ring circuit. The basic digital codes '0' and '1' can be randomly formed by using the dark-bright soliton conversion concept. In this case the high capacity (bit rate) can be generated by nonlinear effects of the two side rings, where the multi-wavelength solitons, i.e. visible (color) solitons can easily be generated and the random bits formed. By using the multiplexed color solitons, the high capacity bit rate transmission can be obtained and seen. Moreover, the long distance is also the advantage, which is useful for small scale digital device applications, especially, for telephone handset, tablet and small digital devices and systems, in which live data transmission can be realized. © 2013 IEEE.
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Multi layer QKD protocol using correlated photon of dark soliton array in a wavelength router
(2012-12-01)
Youplao, P.
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Mitatha, S.
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Yupapin, P. P.
We propose a new protocol of the multi layers quantum router generated by using the multiplexed dark soliton pulses within a microring resonator system. Initially, the multi dark solitons are input into a microring system, where the dynamic dark solitons are controlled and the required quantum states generated. The multivariable quantum key distribution can be formed by using the correlated photon pair of each dark soliton center wavelengths, where the quantum keys (codes) are generated and recovered via the quantum processor in the wavelength router. In application, the secure information with high capacity can be performed incorporating the quantum keys via the quantum processor in the multivariable quantum router.

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