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Articles 1  10 of 10
FullText Articles in Physics
Interaction Of Profiled Light With Contrapropagating Acoustic Waves: Fourier Transform Approach, Partha P. Banerjee, ChenWen Tarn, JawJueh Liu
Interaction Of Profiled Light With Contrapropagating Acoustic Waves: Fourier Transform Approach, Partha P. Banerjee, ChenWen Tarn, JawJueh Liu
Electrical and Computer Engineering Faculty Publications
A straightforward Fouriertransform approach is employed to investigate acoustooptic interaction between an input optical beam with arbitrary profile and contrapropagating cw sound in the Bragg regime. The process can be analyzed in terms of the simultaneous scattering of light by the two sound waves in the interaction region. Analytic expressions for the equivalent transfer functions are obtained and the scattered light profiles are plotted.
Analysis Of Multifrequency Dispersive Optical Bistability And Switching In Nonlinear Ring Cavities With Large MediumResponse Times, Pawel Pliszka, Partha P. Banerjee
Analysis Of Multifrequency Dispersive Optical Bistability And Switching In Nonlinear Ring Cavities With Large MediumResponse Times, Pawel Pliszka, Partha P. Banerjee
Electrical and Computer Engineering Faculty Publications
Using a simple model of a ring cavity comprising a cubically nonlinear medium, we analyze dispersive optical bistability in the presence of more than one spectral component. We show the phenomenon of socalled competition for resonance. In addition to presenting cavity characteristics for the cases of two and three different frequencies, we also discuss the general method for finding steadystate solutions and checking their stability. A simple and efficient algorithm, based on a relaxation method, is devised to find steadystate solutions satisfying appropriate boundary conditions. The relaxation dynamics is physically related to a finite response time of the medium.
Limaçon Of Pascal Locus Of The Complex Refractive Indices Of Interfaces With Maximally Flat ReflectanceVersusAngle Curves For Incident Unpolarized Light, R. M.A. Azzam
Electrical Engineering Faculty Publications
For an interface between two isotropic media the power reflectance R_{v} (ø) is an even function, R_{v} (ø) = R_{v} (), of the angle of incidence ø; hence all the odd derivatives, R_{v}^{(n)} = d^{n} R_{v} /dø^{n} (n odd), are identically 0 at ø = 0, independent of the incident polarization v. When the incident light is unpolarized (v = u), the second derivative, R_{u}^{(2)}, is also 0 at ø = 0, so that the flatness of the R_{u} versusø curve over an initial range of ø starting from ø = 0 is determined by ...
Principal Linear Polarization States Of An Optical System, R. M.A. Azzam
Principal Linear Polarization States Of An Optical System, R. M.A. Azzam
Electrical Engineering Faculty Publications
The constraint on the Jones matrix of an optical system such that there exist two linear polarization states at its input that are mapped onto two corresponding linear states at its output is derived. These principal linear polarization (PLP) states, which characterize a broad range of systems, are also found in terms of the Jones matrix elements. Special cases when the PLP states are orthogonal, collapse onto one state, or become infinite in number are indicated. For a deterministic or nondeterministic optical system described by a Mueller matrix, the existence of two PLP states places a constraint on only 3 ...
Translation Of 'Kamalakanta: A Collection Of Satirical Essays And Reflections', Monish Ranjan Chatterjee
Translation Of 'Kamalakanta: A Collection Of Satirical Essays And Reflections', Monish Ranjan Chatterjee
Electrical and Computer Engineering Faculty Publications
This venture was born initially out of the desire to make those works of Bengali literature which have moved me profoundly, and which I consider firstrate by any yardstick, available to friends and fellow enthusiasts who cannot read the original. In attempting to channel literary and philosophical masterpieces into a different medium, I Have experienced firsthand the formidable challenge that a translator must face because not only of the barrier imposed by the languages involved, but perhaps more so because .of his or her own severely inadequate faculty being called upon to match both the genius and the inspiration of ...
Characteristics And Applications Of The Short External Cavity Laser Diode , JinYong Kim
Characteristics And Applications Of The Short External Cavity Laser Diode , JinYong Kim
Retrospective Theses and Dissertations
The characteristics of the external cavity laser diode are investigated. Emphasis is placed on the short external cavity configuration. The general governing model equations which include the multiple reflection effect are derived. It is shown that the coupling coefficient becomes a complex function of the external cavity length and the near field beam size of the laser diode due to the diffraction loss of an open resonator. The validity of this open resonator model is proven experimentally by the asymmetry in optical power versus external cavity length characteristic curve. For analysis of the ultra short external cavity laser, it is ...
A Comparison And Evaluation Of The Effectiveness Of Computer Simulated Laboratory Instruction Versus Traditional Laboratory Instruction In Solid State Electronics Circuitry , Mahmoud Arshadi Nejad
A Comparison And Evaluation Of The Effectiveness Of Computer Simulated Laboratory Instruction Versus Traditional Laboratory Instruction In Solid State Electronics Circuitry , Mahmoud Arshadi Nejad
Retrospective Theses and Dissertations
This study was designed to compare and evaluate the effectiveness of computer simulated laboratory instruction versus traditional laboratory instruction (utilizing actual electronics components) for educating college students about solid state electronics circuitry. The study also examined the students' attitude toward computer simulated laboratory instruction versus traditional laboratory instruction as a means of conducting laboratory activities;A pretestposttest control group design was used in this experiment. In this study, the researcher randomly assigned subjects to particular groups. The experimental group received the pretests, experimental treatment, posttest I, traditional treatment, posttest II, and the posttests, while the control group received the pretests ...
Theory Of Eddy Current Inspection Of Layered Metals , Erol Uzal
Theory Of Eddy Current Inspection Of Layered Metals , Erol Uzal
Retrospective Theses and Dissertations
Some forward and inverse problems related to layer sizing in eddy current nondestructive evaluation (NDE) were examined and experimental tests were done. An aircore or ferritecore eddy current probe coil above a half space is considered. The half space's conductivity changes only as a function of depth, but otherwise it is arbitrary. A numerical method for the computation of coil impedance based on the exact solution of Cheng, Dodd and Deeds (International Jour. of Nondestructive Testing, 3, 109130,1971) is described. Also, for a specific conductivity profile involving the hyperbolic tangent function, the exact solution for the impedance is ...
Study Of Beamforming Techniques For Ultrasound Imaging In Nondestructive Testing , Sleiman Riad Ghorayeb
Study Of Beamforming Techniques For Ultrasound Imaging In Nondestructive Testing , Sleiman Riad Ghorayeb
Retrospective Theses and Dissertations
Many of the innovations in modern materials testing technology make use of ultrasound. Therefore, the theory and application of ultrasound have become of extreme importance in nondestructive inspection of complete engineered systems. However, despite the fact that most of these ultrasound inspection techniques are based on wellestablished phenomena, two key problems pertaining to their application still remain unresolved. These problems can be identified as (1) the material being tested is assumed to be isotropic and homogeneous by nature, and (2) the scanning/data collection process, prior to the reconstruction scheme, is very time consuming. As a result, techniques for fast ...
Nuclear Emp Hardening Approach As The Basis For Unified Electromagnetic Environmental Effects Protection, George H. Baker Iii
Nuclear Emp Hardening Approach As The Basis For Unified Electromagnetic Environmental Effects Protection, George H. Baker Iii
George H Baker
Operation DESERT STORM demonstrated the clear military advantage that was provided by our sophisticated electronic C4I and weapons systems. High tech means so dominate the battlefield that the outcome of future conflicts could be decided by electronics attrition rather than human casualties. However, the electromagnetic threat landscape is highly complex. The already formidable list of environments (EMI, lighting, ESD, EMP, HERO, TEMPEST, EW, etc.) is lengthened by emerging threats from high power microwave (HPM) and ultrawide band (UWB) electromagnetic weapons. Many of these environments overlap in the frequency and amplitude of the electrical stresses they create.
The large number of ...