A comparison has been made between the physical-optic approach and the ray-optic approach in describing light propagation in a waveguide. In this chapter, the electromagnetic wave theory of the physical-optic approach is developed in detail. Emphasis is placed on the two basic waveguide geometries that are used most often in optical integrated circuits, the planar waveguide and the rectangular waveguide. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Taushicage Bertoni Limited preview — Some examples of mode coupling are discussed in the following: Written by nine authors who are internationally recognized authorities in their areas, the book contains chapters on optical waveguides, lightwave junctions and other thin-film components, lithium-niobate LiNbO3 devices, guided-mode semiconductor GaAs and related lasers and integrated optic devices. My library Help Advanced Book Search. If you like this article, share it with your friends and colleagues, e.
Waveguide Transitions and Junctions. The concept of mode coupling is very often used e. Light-propagation and imaging in planar optical waveguides In this situation, however, not all involved modes are necessarily resonant at the same time. For full-text searches, use our search page. A consequence of that is that the power transfer from a mode A to another mode B can be kept very small simply optial strongly attenuating mode B.
Fiber Bragg gratings FBGs can be understood is fibers which are equipped with additional means for mode coupling — for example, for reflecting light with short period gratings or for coupling waveuides modes guided modes or cladding modes propagating in the same direction with long period gratings.
Guided-wave optoelectronics — Theodor Tamir — Google Books Technically, the mode coupling approach is often used in the form of coupled differential equations for the complex excitation amplitudes of all the involved modes.
A 11 3 This nonresonant nature of the coupling means that the coupling will in general have a small effect — which is essential for laser operation with high beam qualitysince otherwise aberrations would strongly excite higher-order modes, having a higher beam parameter product.
For example, aberrations of the thermal lens in the gain medium of a solid-state bulk laser couple the modes of the laser resonatoras calculated without these aberrations.
This approach is often technically and conceptually much more convenient than, e. Common terms and phrases absorption achieved active layer active region AlGaAs amplifier Appl applications approximately band bandwidth branch capacitance cavity channel guide channel waveguides components confinement coupled-mode coupling loss curves depends devices dielectric diffusion directional coupler effective index electric field electro-optic electro-optic effect electrode epitaxial etched fabricated fiber filter frequency function GaAs gain compression given grating guided modes heterojunction IEEE increases index change InGaAsP input integrated optics length Lett LiNbO3 linear linewidth lithium niobate loss modal mode amplitudes mode conversion normal modes obtained optical waveguides output power parameters parasitics phase modulation phase shift photon density Phys planar polarization power transfer propagation constant R.
Las-Pho, pages Ronald G. Express 19 26B  A. Express 19 11 A. Strong resonant coupling can occur in certain situations, involving frequency degeneracies of resonator modes. In this way, mode B is prevented from acquiring sufficient power to extract power from mode A efficiently, so that mode A experiences only little loss, despite the coupling. Kgelnik book is a completely new waveguidee of the most recent advances in the areas of integrated optics and optelectronics. From inside the book.
The field evolution has been calculated with numerical beam propagation, and the local mode powers have been obtained from the results using overlap integrals with the mode functions as obtained from a mode solver applied to the bare fiber. These equations contain coupling coefficients, which are usually calculated from overlap integrals, involving the two mode functions and the disturbance causing the coupling. Written by nine authors who are internationally recognized authorities in their areas, the book contains chapters on optical waveguides, lightwave junctions and other thin-film components, B 58,  W.
Bertoni Snippet view — An optical fiber may have wavegudes propagation modes, to be calculated for the fiber being kept straight. B 58, The basic idea of coupled-mode theory is to decompose all propagating light into the known modes of the undisturbed device, and then to calculate how these modes are coupled with each other by some additional influence. In addition, it will serve kobelnik a comprehensive reference manual for the theory and application of the most recent thin-film optical and optoelectronic technology.
Account Options Sign in. Guided-wave optoelectronics Volume 26 of Springer series in electronics and photonics. This diagram has been taken from waveguiddes case study on beam propagation in fiber devices.
Express 14 13 The book should be of great interest to all researchers and engineers involved with integrated optics, optoelectronics and electro-optic systems and devices. Because of the systematic arrangement of its chapters, the book should also be very useful to graduate and senior undergraduate students.
Bend losses can be understood as coupling to non-guided and thus lossy modes. Mode Coupling For some cases with statistical variations of coupling effects, one may use a coupled-power theory instead of standard theories based on amplitude coupling .
Springer- Science — pages. Optical resonators cavities can exhibit various kinds of mode coupling phenomena. This mechanism can involve either a Kramers—Kronig effect or thermal distortions influencing the refractive index profile. This picture can serve e. Mode Coupling The concept of mode coupling is very often used e. In high-power fiber amplifiers, a mechanism has been identified which waveguiddes couple power from the fundamental fiber mode into higher-order modes .
Theory of Dielectric Waveguides
Syms, R. Peall, "Explanation of asymmetric switch response of three-arm directional couplers in Ti:LiNbO3 using strong coupling theory," Opt. Huang, W. Lightwave Technol. Chu, and S.
Theory of Optical Waveguides
Taushicage Bertoni Limited preview — Some examples of mode coupling are discussed in the following: Written by nine authors who are internationally recognized authorities in their areas, the book contains chapters on optical waveguides, lightwave junctions and other thin-film components, lithium-niobate LiNbO3 devices, guided-mode semiconductor GaAs and related lasers and integrated optic devices. My library Help Advanced Book Search. If you like this article, share it with your friends and colleagues, e. Waveguide Transitions and Junctions. The concept of mode coupling is very often used e.
2 . Theory of Dielectric Waveguides
This chapter is devoted to the theory of these waveguides. Other chapters of this book discuss their fabrication by such techniques as sputtering, diffusion, ion implantation or epitaxial growth. A well-known optical waveguide is, of course, the optical fiber which usually has a circular cross-section. In contrast, the guides of interest to integrated optics are usually planar structures such as planar films or strips. Our discussion will focus on these planar guides even though most of the fundamentals are applicable to all optical waveguide types. This process is experimental and the keywords may be updated as the learning algorithm improves. This is a preview of subscription content, log in to check access.