Κατεύθυνση Ηλεκτρονική και Ραδιοηλεκτρολογία (Ρ/Η, με πρόσθετη εξειδίκευση στις Τηλεπικοινωνίες και στην επεξεργασία και διοίκηση της Πληροφορίας)
Library of the School of Science

2019-03-03

2019

Siozos Markos

Δημήτριος Φραντζεσκάκης, Καθηγητής, Φυσικής, Ε.Κ.Π.Α

ΔΙΑΔΟΣΗ ΠΑΛΜΩΝ ΣΤΙΣ ΟΠΤΙΚΕΣ ΙΝΕΣ

Greek

PULSE PROPAGATION IN OPTICAL FIBERS

Optical fibers are a typical case of a dielectric medium in which electromagnetic waves can be transmitted. Maxwell equations are the basic analytical tool for describing phenomena that govern the propagation of an optical pulse within the optical fibers. The effects of various phenomena alter the characteristics of the pulses in a linear and non-linear way causing changes in the shape and spectral content of the pulses. The dependence of the refractive index on the frequency results in the phenomenon of dispersion, the main consequence of which is the broadening of the pulse width and the change in its shape. The nonlinear part of the refractive index is responsible for phenomena such as self-phase modulation that causes the exact opposite effect of dispersion, i.e., broadening the pulse in the frequency domain. The combining effects of phenomena self-phase modulation and dispersion can lead under suitable conditions to the propagation of solitons, i.e., pulses that remain unchanged for long propagation lengths. Finally, the parametric processes also influence the propagation of a pulse in a non-linear way. One of the key phenomena that stems from the parametric processes is the four-wave mixing which contributes to the production of new frequency components and the creation of parametric gain.

Science

Optical Fibers, Group-Velocity Dispersion, Self-Phase Modulation, Four Wave Mixing

No

0

Yes

11

56

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https://pergamos.lib.uoa.gr/uoa/dl/object/2864709