Get Applications of Nonlinear Fiber Optics PDF

By Govind Agrawal

ISBN-10: 0120451441

ISBN-13: 9780120451449

Because the box grew, Agrawal made up our minds to separate this article off from his Nonlinear Fiber Optics, that's extra fascinated about the discipline's basics. This version is meant for senior undergraduates, graduate scholars, engineers and technicians within the telecommunications undefined, and scientists operating with fiber optics and optical communications. It covers the construction blocks of light-wave know-how - fiber-based gratings, couplers, and interferometers - in addition to amplifiers and lasers made utilizing rare-earth-doped fibers; pulse-compression recommendations; fiber-optic verbal exchange structures; and soliton-based transmission schemes.

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4 0. 2 0. 22 Temporal signal [(a) and (b)] and its spectrum [(c) and (d)] at the input [(a) and (c)] and output [(b) and (d)] end of a fiber grating designed with a linearly decreasing κ . (After Ref. [141]) bandgap is about 2κ , changes in κ translate into changes in the width of the stop band along the grating length. At a fixed wavelength of input light, such local variations in κ lead to axial variations of the group velocity VG and the GVD parameter β2g , as seen from Eqs. 26). In effect, the dispersion provided by the grating becomes nonuniform and varies along its length.

Mathematically, the parameter δ appearing in the nonlinear coupled-mode equations becomes z dependent. Typically, Λ is designed to vary linearly along the grating, and δ ´zµ δ0 · δc z, where δc is a chirp parameter. Such gratings are called linearly chirped gratings. Chirped fiber gratings have been fabricated using several different methods [49]. It is important to note that it is the optical period nΛ ¯ that needs to be varied along the grating (z axis). Thus, chirping can be induced either by varying the physical grating period Λ or by changing the effective mode index n¯ along z.

2) are only solitary waves (because of the nonintegrablity of the underlying nonlinear coupled-mode equations), they may not survive collisions. On the other hand, the NLS solitons are guaranteed to remain unaffected by their mutual collisions. Numerical simulations based on Eqs. 2) show that Bragg solitons indeed exhibit κ [113]. features reminiscent of a NLS soliton in the low-power limit γ P0 More specifically, two Bragg solitons attract or repel each other depending on their relative phase.

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Applications of Nonlinear Fiber Optics by Govind Agrawal


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