Pipatsart, Surasak

Preferred name

Pipatsart, Surasak

Alternative Name

Pipatsart, S.

Main Affiliation

School of Science

surasak.pi@kmitl.ac.th

Now showing 1 - 10 of 11

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Geometrically distributed one-dimensional photonic crystals for all angle optical filters
(2012-11-01)
Teeka, C.
;
Pipatsart, S.
;
Yupapin, P. P.
We present the general formulation of light reflection using a series of one-dimensional (1D) photonic crystals (PCs) with different periods, which is made of nonabsorptive materials of any refractive indices.To have a large bandgap, the spectral range of reflection, the periods of 1D PCs must be distributed in a geometrical progression with a common ratio, r, smaller than a maximum value of r <inf>c</inf>. In this letter, the exact expressions for rc, the bandgap to mid gap ratio of the PC heterostructure and the minimum number of PCs to achieve the desired range of bandgap in single and all angles of incidence have been presented. The proposed method can be used to design the optical filters for vast range of applications such as ultraviolet (UV) filters (i.e., sunglasses, eye safety glasses, UV photography filters) and visible light filters. © 2012 Wiley Periodicals, Inc.
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SOLITON SPIN in AN ADD-DROP OPTICAL FILTER for LONG DISTANCE SPIN TRANSPORT
(2012-03-01)
Teeka, C.
;
Aziz, M. S.
;
Pipatsart, S.
;
Srinuanjan, K.
;
Ali, J.
A new concept of an optical spin generation using bright and dark soliton conversion behaviors within a modified optical add-drop filters known as a PANDA ring resonator is proposed. The orthogonal solitons can be formed randomly within the system and detected simultaneously at the output ports. Under the resonant condition, the orthogonal solitons corresponding to the left-hand and right-hand solitons (photons) can be generated. Whenever a photon is absorbed by an object, an angular momentum of either + ℏ or - ℏ is imparted to the object, in which two possible spin states known as soliton spins are exhibited. Many soliton spins, i.e., many particles, dynamic spin and long distance spin transport using the proposed design are also discussed.
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An optical tunable band-pass filter using chaotic signals in a nonlinear micro ring resonator
(2008-05-15)
Yupapin, P. P.
;
Suwancharoen, W.
;
Pipatsart, S.
We propose a design of a tunable band-pass filtering device using an optical micro ring resonator. Such a device can be used to generate the required filtering signals in the optical communication transmission line. In principle, the chaotic signals are generated by a Kerr effects nonlinear type via a micro ring resonator. The input power can be used to control the specific filtering signals. The required information can be retrieved from the chaotic signals by using the specific filter, i.e. the specified users. The ring parameters used with the ring radii are ranged between 10-20 μm, and n<inf>2</inf> = 2.2 × 10-15 m2/W. The simulation results obtained have shown the potential of using such a proposed device as tunable band-pass or band-stop filters, which can be used to form the information security.
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Micro stirling engine controlled by light
(2011-01-01)
Pipatsart, S.
;
Kamoldilok, S.
;
Yupapin, P. P.
This paper proposes a new technique for a micro Stirling engine operation using leaky light resonant or whispering gallery modes (WGMs) in a nano-waveguide, in which the nano-waveguide is designed and configured by a nanoring resonator. By using the Optiwave programming based on Finite Difference Time-Domain (FDTD) method, an InGaAsP/InP nanoring resonator was designed and simulated. The simulation results obtained have shown that the leaky light resonant modes can be controlled by the ring radius variations, whereas the maximum resonant peak of nanoring resonator is occurred at the inner and outer ring radii of 0.775 and 1.55 μm respectively. The maximum peak intensity of the nanoring resonator is 12000 W/m2. Finally, the use of leaky light mode resonant peak of the center nanoring resonator for micro-Stirling engine is discussed in details. © 2011 Published by Elsevier Ltd.
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An investigation of dark soliton behaviors within the nonlinear micro and nano ring resonators
(2010-11-01)
Sangwara, N.
;
Teeka, C.
;
Pipatsart, S.
;
Yupapin, P. P.
We firstly propose the interesting results of a dark soliton pulse propagating within the nonlinear micro and nano waveguides. The system consists of nonlinear micro and nano ring resonators, whereas the dark soliton is input into the system and traveling within the waveguide. A continuous dark soliton pulse is chopped to be the smaller pulses by the nonlinear effects known as chaos. The nonlinear behaviors such as chaos, bistability and bifurcation are analyzed and discussed. The power amplification is the property that can be used to perform the long distance link, where the security is the dominant reason. © 2009 Elsevier GmbH. All rights reserved.
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Nano radio and RoF applications
(2012-01-01)
Pipatsart, S.
;
Afroozeh, A.
;
Ali, J.
;
Yupapin, P. P.
A new design of THz frequency carrier generation for radio frequency identification (RFID) application is proposed. The dense wavelength division multiplexing can be generated and obtained by using a Gaussian or soliton pulses propagating within a modified add-drop filter known as a PANDA ring resonator. The broad bandwidth of THz signals can be obtained and available for useful applications, in which the use of the generated THz pulses for RFID application, for instance, Ad-Hoc network using RFID. Results obtained have shown that the increasing in channel capacity can be obtained and useful for the large demand of RFID applications. © 2010 Published by Elsevier Ltd. © 2010 Published by Elsevier Ltd.
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Multi transporters generation for high density molecule transportation via optical communication
(2010-01-01)
Thongmee, S.
;
Pipatsart, S.
;
Yupapin, P. P.
We propose a novel system of a quantum-molecular cryptography using the optical tweezers, whereas the transportation of molecules in the communication system can be performed. The molecule transportation states can be identified by using a single photon state of the transporter, which can be formed in the transmission line. 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 quantum signal processor. The transporter can be formed by the dark soliton, where the optical transporter is tuned and attenuated to be a single photon by the bright soliton control and transmitted into the link. In applications, the use of the proposed system incorporating a quantum processor can be performed the secured molecular communication.
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An aerosol optical thickness investigation in the Suvarnabhumi airport using an inexpensive sunphotometer
(2008-05-15)
Udomwech, K.
;
Yupapin, P. P.
;
Pipatsart, S.
An investigation of the optical thickness of the aerosol surrounded in the Suvranabhumi airport area using the local constructed sun-photometer is reported. The measurement data obtained are presented comparing to the ones obtained by the standard sun-photometer, where the measurement error of 5 % is obtained. The measurement was implemented within a three months period, starting from November 1th, 2006. The optical thickness obtained of 0.45 is noted, which is described in term of air quality as transparent view. Such effects may be introduced by the airplane fuel waste, infrastructure constructions and industrial estates. Further, the effects of the climate changes and global warming around the investigated area, and wireless communication link degradation are discussed.
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Multitweezers generation using dark soliton pulses and applications
(2011-08-01)
Jukgoljun, B.
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Pipatsart, S.
;
Jalil, M. A.
;
Yupapin, P. P.
;
Ali, J.
Multi-dark soliton pulses have been successfully generated by using forward and backward pumping of the S-band erbium doped fiber in the fiber optic loop, where the Stimulated Brillouin Scattering (SBS) is a nonlinear interaction between pump fields with Stokes field through acoustic wave. Results obtained have shown that the dark soliton trains can be generated and configured as the multi-optical tweezers. The advantage is that the generated tweezers are in the form of dynamic tweezers, where they can transmit/transport via the soliton communication link. The single dark soliton is also experimentally generated by using the different fiber optic scheme. We have also theoretically shown that the dynamic tweezers can be controlled and tuned, which is available for trapping and transportation in the communication link via a wavelength router. The quantum states of the transported atoms/molecules by the dynamic tweezers can be performed by using the quantum processing unit incorporating in the system. © 2010 Elsevier GmbH. All rights reserved.
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A proposal of all-wavelength optical amplifiers
(2009-01-01)
Pipatsart, Surasak
;
Dunmeekaew, Ura
;
Pornsuwancharoen, Nithiroth
;
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.

Pipatsart, Surasak

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