Mathematical and numerical modelling of dispersion-managed solitons, autosolitons and self-similar optical pulses
Boscolo, Sonia A. (2002). Mathematical and numerical modelling of dispersion-managed solitons, autosolitons and self-similar optical pulses. PhD thesis, Aston University.
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Firstly, dispersion-managed (DM) solitons in fibre lines employing a weak dispersion map are analysed by means of a perturbation approach. In the case of small dispersion map strengths the average pulse dynamics is described by a perturbation approach (NLS) equation. Applying a perturbation theory, based on the Inverse Scattering Transform method, an analytic expression for the envelope of the DM soliton is derived. This expression correctly predicts the power enhancement arising from the dispersion management. Secondly, autosoliton transmission in DM fibre systems with periodical in-line deployment of nonlinear optical loop mirrors (NOLMs) is investigated. The use of in-line NOLMs is addressed as a general technique for all-optical passive 2R regeneration of return-to-zero data in high speed transmission system with strong dispersion management. By system optimisation, the feasibility of ultra-long single-channel and wavelength-division multiplexed data transmission at bit-rates ³ 40 Gbit s-1 in standard fibre-based systems is demonstrated. The tolerance limits of the results are defined. Thirdly, solutions of the NLS equation with gain and normal dispersion, that describes optical pulse propagation in an amplifying medium, are examined. A self-similar parabolic solution in the energy-containing core of the pulse is matched through Painlevé functions to the linear low-amplitude tails. The analysis provides a full description of the features of high-power pulses generated in an amplifying medium.
|Item Type:||Thesis (PhD)|
|Additional Information:||Department: Engineering and Applied Science Available on request on http://ethos.bl.uk/Home.do|
|Uncontrolled Keywords:||dispersion-managed, perturbation approach, perturbation approach, autosoliton transmission, fibre systems, speed transmission system, optimisation|
|Divisions:||Schools_of_Study > Engineering & Applied Science > Electronic Engineering (EAS)|
Schools_of_Study > Engineering & Applied Science > Electrical, Electronic & Power Eng
|Deposited By:||Mr. Peresi Zigiriza|
|Deposited On:||30 Jun 2010 12:04|
|Last Modified:||08 Jan 2013 18:59|
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