by Aston University. Department of Electronic Engineering and Applied Physics in Birmingham .
Written in English
Thesis (PhD) - Aston University, 1995.
Journals & Books; Help N.J. DoranAverage soliton propagation in periodically amplified systems with stepwise dispersion-profiled fiber. Opt. Lett., 19 (), p. M. Nakazawa, H. KubotaConstruction of a dispersion-allocated soliton transmission line using conventional dispersion-shifted nonsoliton by: The authors have discovered from numerical modelling that there are stable nonlinear transmission pulses for periodically dispersion managed systems where the path average dispersion may be either. Suzuki et al. have experimentally investigated a dispersion compensated soliton transmission system and found that there was an optimum dispersion compensation rate for the system. However, the DCF introduces positive frequency chirp to the soliton periodically and the soliton pulse shape undergoes significant by: 3. We investigate the tolerance of the variation of average dispersion in a Gb/s dispersion-managed soliton (DMS) transmission system. It is theoretically shown that dispersion tolerance is.
Combination of pre-chirp and varying dispersion profile produces soliton like nonlinear pulse having a stationary structure (quasi-soliton). In quasi-soliton system, the interaction with the neighbouring pulse is small and therefore, allows ∼ Gbits/sec transmission . Soliton Pulse Generation. A promising approach to ameliorating the effects of fiber dispersion and nonlinearities that are inherent in very long-distance, high bit-rate optical fiber transmission systems is the use of soliton pulse propagation (see Volume IIIA, Chapter 12). To help make such systems attractive to system designers, a. Recent progress on soliton transmission is described, in which dispersion management plays an important role in increasing the power margin and the dispersion tolerance in TDM and WDM systems. The quality of the dispersion-allocated soliton is compared with RZ and NRZ pulses. The propagation of a soliton in a nonlinear optical fiber with a periodically modulated but sign-preserving dispersion coefficient is analyzed by means of the variational approximation.
Recent advances in fiber characteristics of dispersion-managed fiber is reviewed. We have studied the transmission of single channel RZ systems as well as collision-induced impairments in WDM systems in dispersion-managed fibers. With short period dispersion managed fiber, single channel Gb/s is achievable without transmission control. In practical terms, soliton transmission requires a number of conditions: (1) the transmission medium needs to be designed in such a way that chromatic dispersion and fiber nonlinearity are balanced; (2) optical losses need to be handled carefully, either through distributed amplification or by dispersion management, and (3) the pulse shape and. In this regime, the soliton duration is limited to approximately 10 ps in dispersion shifted fibers. Reduction of soliton widths below this value, while maintaining practical amplifier spacings, leads to increasing emission of dispersive waves that are resonantly amplified periodically, undermining soliton . The circulating soliton is thus subject to periodically occurring disturbances, which couple the soliton to the copropagating dispersive wave. This also happens in a mode-locked fiber laser, even if its laser resonator is made from fibers only, since the pulse energy usually undergoes large changes in each round trip and also because fibers.