Dispersion flattening by optimization of fiber index profile.

摘要

The advent of wavelength division multiplexing (WDM) and the development of AllWaveRTM fiber, which has low attenuation over the bandwidth of 1.30 through 1.60 mum, offers the potential for ultra high capacity optical communication systems. What remains to be solved is manageable dispersion over this bandwidth. This requirement demands the design of non-zero dispersion-flattened fibers. This novel type of optical fiber is usually composed of multiple claddings and requires numerical modeling for its design. Thus, the subject matter of the design is to develop a fast, simple and reliable numerical technique that can simulate dispersion characteristics of optical fibers featuring arbitrary refractive index profiles. In this thesis a numerical tool using the pseudospectral method based on Chebyshev interpolation is developed. Using this tool is possible to determine the refractive index profiles of optical fibers to achieve fibers with low dispersion over a broad spectral bandwidth.