Electromagnetic scattering analysis of dielectric wire-shaped objects in layered media using the RTBC and spline-type divided difference interpolation technique
✍ Scribed by Sungtek Kahng; Jaehoon Choi
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 133 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
of linear chirping, and they were able to explain the distortion effects due to ''dispersive'' propagation of chirped pulses assuming only high values of the semiconductor laser extinction ratio. In high-bit-rate systems, such a parameter is instead rather low, and this imposes more accurate analysis. In this paper, a model is presented that takes into account the real phase modulation due to nonlinear chirping, and analyzes its effect on the evolution of the pulse along the fiber. In particular, the analysis shows that, for realistic values of the laser extinction ratio, the propagating pulse changes from its initial Gaussian shape, and becomes severely distorted. Unlike approaches based on numerical simulations, which could hide the physical origin of effects giving rise to pulse deformation, the proposed analytical model permits us to maintain sensitivity to the physical parameters governing the pulse propagation, and represents a tool that can be applied in frameworks where an expansion in Gaussian terms can simplify the analysis.