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High capacity terahertz frequency combs generated by small scale optical mesh network
(2014-01-01)
Youplao, Phichai
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Pornsuwancharoen, Nithiroth
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Yupapin, Preecha P.
A novel design of mesh ring resonator system is proposed and simulated to obtain the multi frequency comb bands, in which the frequency band less than 10 GHz (about 0.084 nm) of comb lines spacing with commercialized ring parameters is achieved. The proposed system is used to enhance the capacity of optical frequency comb for redundancy networks against the network element failures and to increase the survivability of the communication systems. The dependence of the mesh ring transmission characteristics with coupling coefficients of directional couplers is analyzed and studied. In application, such a system can be employed as an on-chip optical device for redundancy networks against the network element failures and to increase the survivability of the communication systems. The potential for improving the reliability and availability of the optical networks is discussed. Moreover, the proposed system can also be employed as multi sensing devices, where the microscale, for instance, as an atom/molecule force sensor can be measured by the shifted parameters of the Vernier filters. © 2014 World Scientific Publishing Company.
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Quantum memory using the multi-single-photons storage within a micro-waveguide system for security camera use
(2011-05-02)
Pornsuwancharoen, Nithiroth
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Kittisut, Parinya
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Kitcharoen, Narawit
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Yupapin, Preecha P.
We propose a new system of the secret data encoding using a quantum memory that can be formed the high capacity secret codes for camera security. The high capacity encoding is formed by using the spatial mode of the soliton pulse, where the selected output can be stored and the quantum code generated. The perfect security concept by using the single photon property can be used within the embedded device in the camera.
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Novel dark-bright optical solitons conversion system and power amplification
(2009-12-01)
Sarapat, Khuntong
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Sangwara, Narong
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Srinuanjan, Keerayoot
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Yupapin, Preecha P.
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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.
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Proposed nonlinear microring resonator arrangement for stopping and storing light
(2009-03-15)
Yupapin, Preecha P.
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Pornsuwancharoen, Nithiroth
A simple system of an all-optical system for stopping and storing is proposed. A system consists of two microring and a nanoring resonators that can be integrated into a single system. The large bandwidth is generated by a soliton pulse within a Kerrtype nonlinear medium where an all-optical adiabatic and pulse bandwidth compression can be performed. The balance between the dispersion and nonlinear lengths of the soliton pulse exhibits the soliton behavior known as self-phase modulation, which produces a constant optical output. This means that light pulse can be trapped, i.e., stopped optically within the nanowaveguide. © 2009 IEEE.
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Fast and slow light generation using chaotic signals in nonlinear microring resonators for communication security
(2009-01-29)
Pornsuwancharoen, Nithiroth
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Chalyasoonthorn, Sawatsakorn
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Yupapin, Preecha P.
We propose a new system of signal security using nonlinear micro ring resonators for optical communication system. When a soliton pulse Is input into the system, the chaotic signal Is generated and multiplexed into the optical link. The chaotic waveform can be canceled using an add/drop device connected into the transmission link. Using the appropriate ring parameters, the original signal can be retrieved. An other application results from the fact that the fast and slow light behaviors can be presented, and can be seen using the add/drop multiplexers. In some cases, we can generate signal to obtain the two identical "signal" and "ghost" signals, which are observed in a different time frame. In this application, communication security can be performed when the required information is multiplexed and performs the link using the chaotic signal, fast and slow light, and signal and ghost signals, where the original signal can be retrieved by the known clients. © 2009 Society of Photo-Optical Instrumentation Engineers.
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New wavelength division multiplexing bands generated by using a Gaussian pulse in a microring resonator system
(2009-01-01)
Dunmeekaew, Ura
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Tasakorn, Metha
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Pornsuwancharoen, Nithiroth
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Yupapin, Preecha 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 Elsevier B.V. All rights reserved.
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A proposal of all-wavelength optical amplifiers
(2009-01-01)
Pipatsart, Surasak
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Dunmeekaew, Ura
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Pornsuwancharoen, Nithiroth
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Yupapina, Preecha P.
We have shown the interesting results of the optical signal amplifications using a Gaussian pulse propagating within a nonlinear microring resonator system. Several Gaussian pulses with different center wavelengths, for instance, 400-1,500 nm are investigated using the designed system. Results have shown that the optical signal amplification using the nonlinear ring resonator is plausible. By using the input power of 2 W, the optical output of 15 W is achieved. The interesting aspect is that all Gaussian input wavelengths can be amplified which can be useful for other wavelengths in future communication. © 2009 Elsevier B.V. All rights reserved.
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Effective hydrogen generator testing for on-site small engine
(2009-01-01)
Chaiwongsa, Praitoon
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Pornsuwancharoen, Nithiroth
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Yupapin, Preecha P.
We propose a new concept of hydrogen generator testing for on-site small engine. In general, there is a trade-off between simpler vehicle design and infrastructure issues, for instance, liquid fuels such as gasoline and methanol for small engine use. In this article we compare the hydrogen gases combination the gasoline between normal systems (gasoline only) for small engine. The advantage of the hydrogen combines gasoline for small engine saving the gasoline 25 %. Furthermore, the new concept of hydrogen combination for diesel engine, bio-diesel engine, liquid petroleum gas (LPG), natural gas vehicle (NGV), which is discussed in details. © 2009 Elsevier B.V. All rights reserved.

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