Advanced Research Center for Photonics

Bangkok, Thailand

Advanced Research Center for Photonics

Bangkok, Thailand
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Mitatha S.,King Mongkut's University of Technology Thonburi | Dejhan K.,King Mongkut's University of Technology Thonburi | Yupapin P.P.,Advanced Research Center for Photonics | Pornsuwancharoen N.,Rajamangala University of Technology at Tawan-ok
Optik | Year: 2010

We propose a new digital encoding method using light pulses tracing in a micro ring resonator, where the randomly digital codes can be performed. The chaotic signals can be generated and formed by the logical pulses "1" or "0" by using the signal quantizing method, which can be randomly coded by controlling the specific optical input coupling powers, i.e. coupling coefficient (κ) and ring radii. Simulation results when the ring radius used is 10.0 μm, and the other selected parameters are close to the practical device values that are presented and discussed. The random codes can be generated by the random control of coupling powers, which can be transmitted and retrieved via the design filters by the specific clients. For instance, the controlled input power used is between 2.0 and 3.5 mW, whereas the quantizing threshold powers and the traveling roundtrips are 0.3-0.4 mW and 8000-10,000, respectively. In application, the required information can be generated, and the information can be securely transmitted in the public link. © 2008 Elsevier GmbH. All rights reserved.


Mitatha S.,King Mongkut's University of Technology Thonburi | Dejhan K.,King Mongkut's University of Technology Thonburi | Yupapin P.P.,Advanced Research Center for Photonics | Pornsuwancharoen N.,Rajamangala University of Technology at Tawan-ok
Optik | Year: 2010

We propose a new design of secured packet switching generated by using nonlinear behaviors of light in a micro ring resonator. The use of chaotic signals generated by the micro ring resonator to form the filtering and packet switching characteristics is described, where the high-capacity and security switching using such form is presented. The key advantage is that the high capacity of communication data can be secured in the transmission link, where the nonlinear penalty of light traveling in the device is beneficial. For instance, the required information can be transmitted and retrieved by using the proposed packet switching scheme. In principle, the chaotic signals are generated by a Kerr effects nonlinear type of light in a micro ring resonator, where the control input power can be specified by the required output filtering signals. The ring radii used range between 10 and 20 μm, κ=0.0225, α=0.5 dB and n 2=2.2×10 -15 m 2/W. Simulation results obtained have been described based on the practical device parameters. Three forms of the applications have been simulated, the potential of using for the tunable band pass and band stop filters, in which high-capacity packet switching data can be performed, and the fs switching time is plausible. © 2008 Elsevier GmbH. All rights reserved.


Mitatha S.,King Mongkut's University of Technology Thonburi | Dejhan K.,King Mongkut's University of Technology Thonburi | Yupapin P.P.,Advanced Research Center for Photonics | Pornsuwancharoen N.,Rajamangala University of Technology at Tawan-ok
Optik | Year: 2010

This paper proposes the interesting nonlinear behavior of light known as bifurcation, where the use of such behavior in a micro ring resonator to form the secure digital codes for optical packet switching application is demonstrated. A new concept of the stop-start bits in an optical packet switching protocol is formed by using the bifurcation codes. Bifurcation is introduced when light is input into a nonlinear micro ring device, where the refractive index of an InGaAsP/InP is one of device parameters. The other parameters of the device are coupling coefficient (K) and the ring radius (R), where the ring radii used are ranged from 5 to 10 μm. Simulation results obtained have shown that the packet switching data can be secured by using the generated start-stop bits as the secured codes. © 2008 Elsevier GmbH. All rights reserved.


Khunnam W.,Naresuan University | Yupapin P.P.,Advanced Research Center for Photonics
Optik | Year: 2010

We firstly present a concept of a self-calibration of the classical and quantum parameters' measurement using a fiber optic system. The measurement of the change in phase of the optimum entangled states' visibility is performed in terms of a walk-off length, i.e. birefringence. The applied physical parameters on the sensing fiber can be simultaneously measured and the self-calibration respecting the birefringence performed. The scheme of the entangled photons generation in fiber optic is reviewed and the walk-off on the polarization entangled states presented. The potential of self-calibration and simultaneous measurement using an interferometric sensing technique and fiber grating sensor are proposed and discussed. The walk-off on the entangled states in the thermal-controlled environment is presented and discussed. © 2009 Elsevier GmbH. All rights reserved.


Yupapin P.P.,Advanced Research Center for Photonics | Yabosdee P.,Advanced Research Center for Photonics | Phiphithirankarn P.,Advanced Research Center for Photonics
Optik | Year: 2010

This paper proposes a new concept of birefringence-based sensor using the entangled photon timing walk-off compensation. The superposition of nonlinear light known as four-wave mixing is introduced by the Kerr nonlinear effects type within the ring device. The possible two entangled photon pairs are randomly generated using the polarization control unit. Results obtained have shown that the entangled state walk-off of light traveling within the ring device can be compensated. This means the changes in walk-off parameters can be relatively measured to the changes in the applied physical parameters. The potential of using such a proposed system for birefringence-based sensor applications is plausible and discussed. © 2008 Elsevier GmbH. All rights reserved.


Thongmee S.,Advanced Research Center for Photonics | Yupapin P.P.,Advanced Research Center for Photonics
Optik | Year: 2010

We propose a new design of the secure packet switching device using the nonlinear behaviors of soliton in a micro ring resonator, where the nonlinear penalty of light traveling in the device becomes beneficial. The chaotic signals are generated by a Kerr effects nonlinear type of the input soliton pulse in a micro ring resonator, where the control input power can be used to specify the output filtering signals. Some device parameters are chosen and simulated using the proposed model. The potential of using such a device for communication security is performed and discussed. For instance, the packet switching of the chaotic encoding data increases from the chaotic signal encoding of 100 bits-1. Results obtained have shown the potential of using such a proposed device for the tunable bandpass and band-stop filters, in which packet switching data can be performed and secured. © 2008 Elsevier GmbH. All rights reserved.


Yupapin P.P.,Advanced Research Center for Photonics | Yabosdee P.,Advanced Research Center for Photonics
Optik | Year: 2010

We first propose a concept of a new interferometric technique, where the ultra-narrow spectral width of light pulse generated by using the micro-ring resonators can be used to perform the ultra-high-resolution interferometer. Firstly, the SHG using micro-ring resonators is analyzed and described, Secondly, the increasing in optical path difference (OPD) depends on the full-width at half-maximum (FWHM) width of the generated pulse is discussed. Finally, the optimum entangled photon visibility can be formed the quantum interferometer where the measurement resolution of 10-5-10-7 in term of birefringence is achieved. The use of such systems for quantum interferometer, high-resolution interferometer and surface characterization are described. © 2008 Elsevier GmbH. All rights reserved.


Yupapin P.P.,Advanced Research Center for Photonics
Optik | Year: 2010

We propose a novel system of quantum key generation via a micro ring resonator for mobile telephone network use, where the conversation messages can be secured by using a quantum code/decode (CODEC) technique incorporated in the public networks. The system consists of a set of micro ring devices incorporating a Mach-Zehnder interferometer (MZI). The entangled photon with different time slots is generated via each micro ring device, which is connected to an MZI. In each micro ring device, the time delay and the Kerr nonlinearity effect are exploited for the qubit (quantum key) generation. At present, fabrication technology has been promising in that the quantum key can be implemented within the mobile telephone hand set and networks, and it has also shown the feasibility of using as perfect security telephone networks. © 2008 Elsevier GmbH. All rights reserved.


Yupapin P.P.,Advanced Research Center for Photonics | Sangwara N.,Advanced Research Center for Photonics | Pornsuwancharoen N.,Rajamangala University of Technology at Tawan-ok
Optik | Year: 2010

We present the interesting results of nonlinear behaviors of a soliton pulse within a nonlinear micro ring resonator system, where the optical filter characteristics in terms of frequency, wavelength and time can be functioned by using the chaotic filter within the micro ring resonator system. There are three forms of applications using the chaotic soliton behaviors and optical filter characteristics presented. Firstly, the simultaneous up-link and down-link frequency bands can be filtered and the required frequency bands obtained. Secondly, we propose the simple system of an extremely narrow light pulse generation over the spectrum range, where the required wavelengths can be filtered and obtained. Finally, a simple system of fast light generation by using a soliton pulse circulating in the integrated micro ring devices is proposed. Using such a system, an attosecond pulse and beyond can be easily filtered and obtained. © 2008 Elsevier GmbH. All rights reserved.


Yupapin P.P.,Advanced Research Center for Photonics | Sripakdee C.,Rajamangala University of Technology at Phra Nakhon
Optik | Year: 2010

We firstly analyze the thermal dissipation effects of the entangled photons generated by a nonlinear optical ring resonator. To obtain the corresponding equation of motion of the entangled photons generated by a four-wave mixing process within the system, we propose the Markov approximation to repel the reservoir operators. The system master equation in the interaction picture for both degenerate and non-degenerate cases is analyzed and obtained. The established system can be used to characterize the optimum entangled photons in some cases where the thermal dissipation effects may introduce noise into the system. In this work, the entangled photons can be generated into two forms, firstly, the two entangled photon states are generated and, the other, the four entangled photon states, can be easily obtained. Results obtained have shown that the optimum entangled photon in terms of entangled photon visibility can be compensated (i.e. unchanged) under thermal dissipation effects. © 2008 Elsevier GmbH. All rights reserved.

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