H. Kogelnik, “Theory of Optical-Waveguides in Guided Wave Optoelectronics,” Springer-Verlag, Berlin, , pp. H. Kogelnik, “Theory of dielectric waveguides,” in Integrated Optics,T. Tamir, Ed. mode theory for optical waveguides was developed in early seventies [6–11]. optics. This chapter is devoted to the theory of these waveguides. Other chapters of .. which is taken from KOGELNIK and RAMASWAMY.

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### Light-propagation and imaging in planar optical waveguides – IOPscience

Instead of using coupled-mode theory, which is based on simplifying assumptions which are not always well fulfilledone can also study mode coupling phenomena with numerical beam propagation. An important physical aspect of such coherent mode coupling phenomena is that the waveguidex power transferred between two modes depends on the amplitudes which are already in both modes.

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 kogslnik 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.

This means then that the amplitude contribution which is fed e. This method is computationally more intense, but can generate more detailed insight.

### Guided-wave optoelectronics – Theodor Tamir – Google Books

Express 19 26B Bertoni Snippet view – Wavegukdes 19 26B [12] A. Waveguide Transitions and Junctions. Alferness radiation modes ratio reduced reflection refractive index resonance rib guide shown in Fig signal single-mode slab guide slab waveguide solutions spontaneous emission structure substrate switch symmetric techniques thickness threshold TM modes transition transverse wave equation waveguide mode wavelength width.

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. Strong resonant coupling can occur in certain situations, involving frequency degeneracies of resonator modes.

Encyclopedia of Optical Engineering: Las-Pho, pages Ronald G. In this waveguives, however, not all involved modes are necessarily resonant at the same time.

## Mode Coupling

Driggers Limited preview – Evolution of mode powers in a long-period fiber Bragg grating, which couples light from the injected fundamental mode radiation into higher-order modes. Express 19 11 The book is a completely new survey of the most recent advances in the areas of integrated optics and optelectronics.

Nonlinear interactions in a waveguide can also couple the kogslnik as calculated for low light intensities to each other. A consequence of that is that the power transfer from a mode A to another mode B can be kept very small simply by strongly attenuating mode B. Sorry, we don’t have an article for that keyword! In high-power fiber amplifiers, a mechanism has been identified which can couple power from the fundamental fiber mode into higher-order modes [12].

Some examples of mode coupling are discussed in the following: The book should be of great interest to hheory 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. Express 19 11[13] A.

For some cases with statistical variations of coupling effects, one may use a coupled-power theory instead of standard theories based on amplitude coupling [11]. This mechanism can involve either a Kramers—Kronig effect or thermal distortions influencing the refractive index profile.

This picture can serve e. The concept of mode coupling is very often used e. From inside the book.

RP Services and Tools. Account Options Sign in. Typically, the applied procedure is first to calculate the mode amplitudes for the given light input, then to propagate these amplitudes based on the above-mentioned coupled differential equations e.

References to this book Encyclopedia of Optical Engineering: 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. Guided-wave optoelectronics Volume 26 of Springer series in electronics and photonics. Mode Coupling The concept of mode coupling is very often used e. This leads to a strong loss of beam quality above a certain pump power level.

B 58, [7] W. 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 to modes guided modes or cladding modes propagating in the same direction with long period gratings. If you like this article, share it with your friends and colleagues, e. These equations contain coupling coefficients, which are usually calculated from overlap integrals, involving the two mode functions and the disturbance causing the coupling.

A 11 3 Encyclopedia … combined with a great Buyer’s Guide! My library Help Advanced Book Search. B 58,