Outer layer cladding refractive index n 2 n 2 pdf 57p this note covers the following topics. A plane optical wave is propagating toward the interface with wave vector k i oriented at angle. In wave optics, the descartes sphere is also known as ewald sphere or simply as the ksphere. Optical fiber wave guiding to understand transmission mechanisms of optical fibers with dimensions approximating to those of a human hair. In this case the boundary conditions are that y 0 at the two ends of the string. Nonlinear optical wave equation for micro and nanostructured media and its application dr. March 20 final report for 01 october 2011 to 30 september 2012. The wave equation is a secondorder linear hyperbolic pde that describesthe propagation of a variety of waves, such as sound or water waves. Youngs experiment was based on the hypothesis that if light were wave like in nature, then it should behave in a manner similar to ripples or waves on a pond of water. The book discusses digital fourier transforms ft, ftbased operations, multiple methods of wave optics simulations, sampling requirements, and simulations in atmospheric turbulence. We define a ray starting from the object point and passing through the system aperture at a point described by its polar coordinates s. Lecture notes optics pdf 57p this note covers the following topics. Optical fiber is enabled by the optical field confinement mechanism of the waveguide. Passive waveguides, electrooptic components, transmitters, receivers, and driving electronics can be integrated into one chip using planar technology, similar to microelectronics.
Then you come to the chapter on wave optics, and you are told that light travels as a wave, that it can bend around objects, it can diffract and interfere, etc. This book will benefit optical scientists and engineers at all levels as a guide for ftbased data analysis, imaging system analysis, and wave optics simulations. Phase velocity is the speed of the crests of the wave. Wave propagation in cylindrical optical waveguides waveguides for signal transmission must propagate a wave longitudinally in the zdirection. Covering the basics of wave propagation, reflection, refraction, anisotropic media, interference, diffraction, and coherence, this questionandanswer collection provides the opportunity to solve problems chosen by a mentor with decades.
The 3d wave equation plane wave spherical wave mit 2. To derive the fresnel equations, consider two optical media separated by an interface, as shown in fig. Optical properties of plasmonic materials maxwells equations state that a dielectricmetallic interface can support surface plasmon polaritons spps, which are coherent electron oscillation waves that propagate along the interface with an electromagnetic wave. Rongqing hui, in introduction to fiberoptic communications, 2020. Wave equation in homogeneous media and the scalar wave equation. Therefore, optoelectronic detectors only register the average energy flux this referred to as irradiance or intensity of the optical field. Mathematically, the modes are solutions of a wave equation and satisfy specified boundary conditions. Application of the parabolic wave equation to xray diffraction optics. We now turn to a monochromatic single color optical field. Fiber acts as an open optical waveguide may be analyzed using simple ray theory geometric optics. Nonlinearoptical processes are often referred to as. Inner layer core of radius aand refractive index n 1.
If the medium is linear and has only an induced polarization described by the susceptibility. Pdf this book was devoted to a discussion and study. For the string, one end is at x 0 and the other at x a. Elementary waves in free space the electromagnetic plane wave. The wave equation governs a wide range of phenomena, including gravitational waves, light waves, sound waves, and even the oscillations of strings in string theory. Optical solitary wave and elliptic function solutions of the fokaslenells equation in the presence of perturbation terms and its modulation instability muhammad arshad1,2,5, dianchen lu1, muttiur rehman3, iftikhar ahmed1 and abdul malik sultan4 1faculty of science, jiangsu university, zhenjiang, jiangsu 2120, people. Table iii gives a list of 36 zernike polynomials, plus the constant term. The intensity of waves called irradiance in optics is defined as the power delivered per unit area. For example, pressure is the intensity of force as it is forcearea. What we mean by a wave equation will gradually be made more precise as we proceed, but. It is a threedimensional form of the wave equation. Depending on the medium and type of wave, the velocity v v v can mean many different things, e. In general, however, the wavefront is not symmetric, and both sets of trigonometric terms are included.
Light waves that is, electromagnetic waves behave like other waves. This wave will be moving with a phase velocity given by vphase. Chapter 4 the wave equation another classical example of a hyperbolic pde is a wave equation. The wave equation outline of mechanical waves longitudinal and transverse waves waves in a string, sound waves the wave equation description of waves using functions of two variables travelling waves the wave equation 0 y v y 1 2 2 2 2 2 x t waves in a string. For this case the right hand sides of the wave equations are zero.
The proper way to describe the power transfer characteristics of all such wave types, i. Beam wave considerations for optical link budget calculations. Optical solitary wave and elliptic function solutions of the. In the derivation of the wave equation for the pulse envelope 2. All solutions are new and verified the main equation of the paraxial wave equation. You can determine the wave frequency and period, predict how fast light travels in various materials, and determine how light. It is customary in the theory of optical fibers to make the weakly guiding approximation n.
Wave optics wave front the wave front at any instant is defined as the locus of all the particles of the medium which are in the same state of vibration. The wave optics module extends the functionality of the physics interfaces of the base. For a symmetrical optical system, the wave aberrations are symmetrical about the tangential plane and only even functions of are allowed. The electromagnetic wave from maxwells equations contd 2 2 t e e w w u u 2 2 2 t e e e o o w w x ph xe 0 using the vector identity becomes, in free space and we are left with the wave equation 0 2 2 2 w w t e e p oh o. Low absorption of the materials that construct the optical waveguide is another. The electromagnetic wave from maxwells equations contd 2 2 t e e w w u u 2 2 2 t e e e o o w w x ph xe 0 using the vector identity becomes, in free space and. Basic wavefront aberration theory for optical metrology. It simplifies the characteristic equation for the modes. An introduction to wave equations and solitons richard s. Optical solitary wave and elliptic function solutions of. This paper discusses the theory of fwm, and then introduces one of its applications a broadband all optical simul.
A study of optical wave propagation in the nonautonomous schrodingerhirota equation with powerlaw nonlinearity article pdf available in results in physics march 2019 with 397 reads. Here are some wave formulas that are useful when youre working with optics. Chapter 1 optical properties of plasmonic materials. Fresnel equations encyclopedia of optical engineering. The field is often observed or measured at a planar surface along the optical axis z. A variety of different integrated optical waveguides are used to confine and guide light on a chip. The wave equation 3 this is the desired wave equation, and it happens to be dispersionless. Often designated a quasiparticle, it represents an excited state in the quantum mechanical quantization of the modes of vibrations of elastic structures of interacting particles. The electromagnetic wave equation is a secondorder partial differential equation that describes the propagation of electromagnetic waves through a medium or in a vacuum. Irradiance aka intensityfrom the definition of the poynting vector and the k, e, b relationship, for a harmonic sinusoidal wave propagating along z recall at optical frequencies, the field oscillates very rapidly, 10 14 1015 hz. Numerical simulation of optical wave propagation with. Fourwave mixing in optical fibers and its applications.
Review of basic principles in optics, wavefront and. The rotating wave approximation rwa results from the neglect of all e. Example a sinusoidal wave of frequency 500 hz has a speed of 350 ms. Chapter maxwells equations and electromagnetic waves. We will derive the wave equation from maxwells equations in free space where i and q are both zero. The underlying equations for electromagnetics are automatically available in all of the. All vibrations of the string can be expressed as a sum of allowed modes. The electric field amplitude of the wave is given by e i. For example, the solution to the wave equation when absorption or ampli cation takes place contains an exponential with a complex argument. They can reflect, refract bend, and interfere with each other. Optical solitons for paraxial wave equation in kerr media. The dispersion relation of the harmonic wave solution. Nonlinear optical wave equation for micro and nano.
Notice, you are not being asked for the values of y1 nor y2. This equation is mathematically the same as the harmonic oscillator equation and has solutions where is a constant vector. Simple derivation of electromagnetic waves from maxwells equations. Review of basic principles in optics, wavefront and wavefront. Maxwells derivation of the electromagnetic wave equation has been replaced in modern physics education by a much less cumbersome method involving. Article pdf available in optics communications 11856.
Often designated a quasiparticle, it represents an excited state in the quantum mechanical quantization of the modes of vibrations of elastic structures of interacting particles phonons play a major role in many of the physical. This is the wave equation driven by the polarization in the medium. Sometimes, one way to proceed is to use the laplace transform 5. Optical waveguides are the key elements of photonic devices that perform guiding, coupling, switching, splitting, multiplexing and demultiplexing of optical signals. Pdf optical solitons for paraxial wave equation in kerr. We might think that we would choose continuity of the wavefunction derivative across the boundary. These equations are coupled together and are equivalent to a 3 x 3 matrix. Maxwells equations and derivation of the wave equation for light. Or aan imaginary surface passing through particles oscillating with same phase is known as. Pdf optical solitons for paraxial wave equation in kerr media. The wave optics module users guide comsol documentation.
The most basic optical waveguide is a slab waveguides shown below. Typical values for wave aberration iglesias et al, 1998 navarro et al, 1998 liang et al, 1994 liang and williams, 1997 liang et al, 1997 walsh et al, 1984. Optical wave is a special category of electromagnetic waves which can propagate in free space as well as been guided with dielectric waveguides. Emittedlight photon energy this cartoon illustrates a 6wave mixing process. In physics, a phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, specifically in solids and some liquids. Optical fiber a single solid dielectric of two concentric layers. Necessary to consider the optical waveguiding of a cylindrical glass fiber. Because he believed that light was composed of waves, young reasoned that some type of interaction would occur when two light waves met. The unique properties of the interface waves result from the frequencydependent. It is simpler to visualize a wave by drawing the wave fronts, which are usually taken to be the crests of the wave. When the elasticity k is constant, this reduces to usual two term wave equation u tt c2u xx where the velocity c p k. Four wave mixing fwm is a phenomenon that must be avoided in dwdm transmission, but depending on the application it is the basis of important secondgeneration optical devices and optical device measurement technology. Pdf application of the parabolic wave equation to xray diffraction. Continuouswave dfwm may be expressed by the following nonlinear coupledmode equations1 fourwave mixing in optical fibers and its applications by osamu aso, masateru tadakuma and shu namiki four.
The wavefront shape at the observation plane is, therefore, of particular interest. Chapter 2 maxwellbloch equations mit opencourseware. The wave equation handbook of optical systems wiley. The intensity, impedance and pressure amplitude of a wave. In optical region, light has a wavelength of about half a micrometre. With 272 selected problems and answers, this study aid is a powerful supplement to the study of wave optics. The homogeneous form of the equation, written in terms of either the electric field e or the magnetic field b, takes the form.
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