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IEEE PhotonicsGlobal@Singapore, IPGC

作者： Malin Premaratne Advanced Computing and Simulation Laboratory (AXL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia

Short-pulse propagation in optical amplifiers has been widely studied for applications in optical signal processing and optical communications areas. Even though it is possible to integrate differential equations numerically, such implementations may not provide adequate insight into the device operation. We propose a systematic way to construct analytical solutions under pulsed conditions and show excellent agreement with numerically integrated results. Our approach makes use of the multiple-scale technique in which different time scales associated with physical processors are cleverly used to partition amplifier response to different regions where analytical solution can be found using simple techniques.

关键词： Stimulated emission Semiconductor optical amplifiers Optical amplifiers Pulse amplifiers Optical pulses Optical signal processing Space vector pulse width modulation Optical pulse shaping Optical computing Atom optics

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Picosecond pulse amplification in semiconductor optical amplifiers: A multiple-scale analysis

Picosecond pulse amplification in semiconductor optical ampl...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Malin Premaratne Govind P. Agrawal Advanced Computing and Simulation Laboratory (AcL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia Institute of Optics University of Rochester Rochester NY USA

We propose a systematic way for analyzing gain-recovery dynamics in semiconductor optical amplifiers using a multiple-scale analysis and show that the resulting analytical solution for the amplified pulse agrees well ... 详细信息

ISBN: (纸本)9781557528599

关键词： Optical pulses Pulse amplifiers Semiconductor optical amplifiers Optical pulse shaping Stimulated emission Charge carrier density Optical computing Modeling Space vector pulse width modulation Equations

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Preconditioners for higher order edge finite element discretizations of Maxwell's equations

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Science China Mathematics 2008年第8期51卷 1537-1548页

作者： ZHONG LiuQiang1,2,SHU Shi1,2,SUN DuDu3&TAN Lin4 1School of Mathematical and Computational Sciences,Xiangtan University,Xiangtan 411105,China 2Hunan Key Laboratory for Computation and simulation in Science and Engineering,Xiangtan 411105,China 3Institute of Computational Mathematics and Scientific/Engineering computing,Academy of Mathematicsand systems Science,Graduate University of Chinese Academy of Sciences,Chinese Academy Sciences,P.O.Box 2719,Beijing 100190,China 4department of Math-Physics,Nanhua University,Hengyang 421001,China 1. School of Mathematical and Computational Sciences Xiangtan University Xiangtan 411105 China 2. Hunan Key Laboratory for Computation and Simulation in Science and Engineering Xiangtan 411105 China 3. Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and Systems Science Graduate University of Chinese Academy of Sciences Chinese Academy Sciences P.O. Box 2719 Beijing 100190 China 4. Department of Math-Physics Nanhua University Hengyang 421001 China

In this paper,we are concerned with the fast solvers for higher order edge finite element discretizations of Maxwell's *** present the preconditioners for the first family and second family of higher order N′ed′elec element equations,*** combining the stable decompositions of two kinds of edge finite element spaces with the abstract theory of auxiliary space preconditioning,we prove that the corresponding condition numbers of our preconditioners are uniformly bounded on quasi-uniform *** also present some numerical experiments to demonstrate the theoretical results.

关键词： preconditioner higher order edge finite element stable decomposition

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A researcher's Discipline

A researcher's Discipline

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2007 Winter simulation Conference, WSC

作者： Paul, Ray J. Centre for Applied Simulation Modelling Department of Information Systems and Computing Brunei University Uxbridge Middlesex UB8 3PH United Kingdom

ISBN: (纸本)1424413060

Can a PhD be of even greater benefit to a candidate than just the award of the PhD? This paper argues yes, A PhD is a process of learning by doing, during which the successful candidate discovers what being a researcher is all about, and how to write academically. The PhD dissertation is the artifact that demonstrates that the process has been undertaken successfully. It might appear that this is as much as you can expect from a PhD. Upon completion and successful defense, the intensity of focus and effort in the last stages often leaves the successful candidate almost bereft, so all consuming has this been. It would be asking too much perhaps to want more. This paper sets out to show that more should be required, not for the PhD itself, but to benefit the candidate even more. The question is how? © 2007 IEEE.

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A researcher’s discipline 07

A researcher’s discipline

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simulation Winter Conference

作者： Ray J. Paul Centre for Applied Simulation Modelling Department of Information Systems and Computing Brunei University Uxbridge Middlesex UK

ISBN: (纸本)9781424413065

Can a PhD be of even greater benefit to a candidate than just the award of the PhD? This paper argues yes. A PhD is a process of learning by doing, during which the successful candidate discovers what being a researcher is all about, and how to write academically. The PhD dissertation is the artifact that demonstrates that the process has been undertaken successfully. It might appear that this is as much as you can expect from a PhD. Upon completion and successful defense, the intensity of focus and effort in the last stages often leaves the successful candidate almost bereft, so all consuming has this been. It would be asking too much perhaps to want more. This paper sets out to show that more should be required, not for the PhD itself, but to benefit the candidate even more. The question is how?

关键词： Statistics Computational modeling Scholarships Brain modeling Packaging Information systems Potential well Writing Engineering profession Humans

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Gain modulation dynamics of a Raman amplified WDM system using time-division multiplexed pumps

Gain modulation dynamics of a Raman amplified WDM system usi...

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International Symposium on High Capacity Optical Networks and Enabling Technologies, HONET

作者： Vineetha Kalavally Malin Premaratne Tin Win Department of Electrical and Computer Systems Engineering School of Engineering Monash University Petaling Jaya Selangor Malaysia Department of Electrical and Computer Systems Engineering Advanced Computing and Simulation Laboratory Monash University Clayton Victoria Australia

ISBN: (纸本)9781424418282

The gain modulation characteristics of an 80 nm wide, counter-pumped distributed Raman amplified WDM system has been studied when the pumps are time division multiplexed. When many optical amplifiers are employed in multi-repeater transoceanic systems, the pump is intensity modulated to obtain information about the health of the repeaters. Gain modulation dynamics referring to dynamics of pump modulation transferred to the signal is studied to help make a reasonable choice of pump wavelength for modulation and to provide power compensation if necessary from the resulting power penalty. In this paper, we study using numerical modeling, the effect of time division multiplexed pumping on the gain modulation dynamics in a WDM system. It is found that modulation transfer response is flatter and stronger across the WDM channels when the Raman amplifier pumps are time division multiplexed. The resulting increase in power penalty is determined.

关键词： Gain Modulation Time division multiplexing Stimulated emission Wavelength division multiplexing Optical fiber amplifiers Intensity modulation

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Simultaneous estimation of optical flow and object state: A modified approach to optical flow calculation

Simultaneous estimation of optical flow and object state: A ...

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IEEE International Conference on Networking, Sensing and Control

作者： Pubudu N Pathirana Allan E.K. Lim John Carminati Malin Premaratne School of Engineering and Information Technology Deakin University Geelong Australia Advanced Computing and Simulation Laboratory (AXL) Department of Electrical and Computer Systems Monash University Clayton VIC Australia

Differential optical flow methods are widely used within the computer vision community. They are classified as being either local, as in the Lucas-Kanade method, or global, as in the Horn-Schunck technique. As the physical dynamics of an object is inherently coupled into the behavior of its image in the video stream, in this paper, we use such dynamic parameter information in calculating optical flow when tracking a moving object using a video stream. Indeed, we use a modified error function in the minimization that contains physical parameter information. Further, the refined estimates of optical flow is used for better estimation of the physical parameters of the object in the simultaneous estimation of optical flow and object state(SEOS).

关键词： Image motion analysis State estimation Optical sensors Optical filters Optical noise Parameter estimation Nonlinear optics Streaming media Optical fiber networks Computer vision

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simulation of a device concept for noninvasive sensing of blood glucose levels

Simulation of a device concept for noninvasive sensing of bl...

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International Conference on Information and Automation for Sustainability (ICIAfS)

作者： Chintha C. Handapangoda Malin Premaratne David M. Paganin Advanced Computing and Simulation Laboratory Department Electrical and Computer Systems Eng Monash University Clayton VIC Australia School of Physics Faculty of Science Monash University Clayton VIC Australia

ISBN: (纸本)9781424418992;9781424419005

This paper introduces a method of modeling noninvasive glucose sensing for patients who suffer from diabetes mellitus. The proposed technique involves simulation of light propagation through biological tissue with an embedded photonic crystal. The proposed detection technique is Raman spectroscopy and the use of the photonic crystal enables the enhancement of Raman scattering by engineering the photon density of states. Further enhancement can be achieved using noble metal clusters which result in surface enhanced Raman scattering and has the ability to provide enhancements of up to a million times.

关键词： Blood Sugar Photonic crystals Optical propagation Raman scattering Skin Maxwell equations Computational modeling Diabetes Australia

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Modeling of Light Propagation through Biological Tissues: A Novel Approach

Modeling of Light Propagation through Biological Tissues: A ...

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Frontiers in the Convergence of Bioscience and Information Technologies, FBIT

作者： Chintha C. Handapangoda Malin Premaratne Leslie Yeo James Friend Advanced Computing and Simulation Laboratory (AXL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia Micro/Nanophysics Research Laboratory (MNRL) Department of Mechanical Engineering Monash University Clayton VIC Australia

An efficient numerical technique for modeling biological tissues using the radiative transfer equation is presented. Time dependence of the transient radiative transfer equation is approximated using Laguerre expansion. Azimuthal angle is discretized using the discrete ordinates method and the resulting set of ordinary differential equations is solved using the Runge-Kutta-Felhberg method.

关键词： Biological system modeling Optical propagation Biological tissues Equations Biology computing Laboratories Numerical models Azimuthal angle Optical scattering Cancer detection

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Challenges in Photonic System simulation

Challenges in Photonic System Simulation

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International Conference on Numerical simulation of Optoelectronic Devices, (NUSOD)

作者： Malin Premaratne Advanced Computing and Simulation Laboratory (AXL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia

A comprehensive analysis on the requirements and challenges of next generation photonic system simulator technology for hybrid hierarchical optical networks is presented. Key challenges need to be met by simulator des... 详细信息

关键词： Optical fiber networks Optical design Traffic control Circuit simulation Computational modeling Telecommunication traffic Analytical models Electronics industry Optical sensors Image motion analysis

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