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2 Journal of Telecommunications and Information Technology

2 2000

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Power penalty caused by Stimulated Raman Scattering in WDM Systems

Pietrzyk S., Szczęsny W., Marciniak M.

Journal of Telecommunications and Information Technology

2000

nr 1-2

52-58

In this paper we present results of an investigation into the power penalty introduced by Stimulated Raman Scattering (SRS) in WDM systems with concentration on application of dispersion-shifted single-mode optical fibres (G.653) and unequal channel allocation schemes. System parameters based on ITU-T Recommendation G.692 and analytic formulas were used in calculations. It is shown that SRS does present a practical limitation to the multichannel systems. We also indicate limitations of the G.692 Recommendation and we point at directions of study in the area of nonlinear phenomena and multichannel systems.

Impact of nonlinear optical phenomena on dense wavelength division multiplexed transmission in fibre telecommunication systems

Szczęsny W., Marciniak M.

Journal of Telecommunications and Information Technology

2000

nr 1-2

61-65

In the paper results of analysis of nonlinear phenomena in optical fibres: Self-Phase Modulation, Cross-Phase Modulation, Four-Wave Mixing and Stimulated Raman Scattering and their influence on Dense-Wavelength Division Multiplexed system performance are reported. Different nonuniform optical channel allocation schemes based on ITU Recommendation G.692 100 GHz frequency grid are compared with uniform channel distribution. The level of nonlinear cross-talk is determined for different levels of the total optical power. As an example a 10 Gbit/s D-WDM dispersion-shifted single mode fibre link with dispersion-compensating fibres is envisaged. The directions for optimization of the system design in view of actual international standardization trends are pointed out.