DISPERSION MANAGEMENT IN ULTRA-HIGH-SPEED LONG-HAUL OPTICAL TRANSMISSION SYSTEMS

摘要

Dispersion characteristics in ultra-high-speed optical transmission systems is deeply analyzed over a span of optical wavelengths from 1.3 μm up to 1.65 μm. Two different fiber structures for dispersion management are investigated, where two successive segments of single mode fiber made of Germania doped Silica (SiO_2(1-x)+GeO_2(x)) are suggested to be employed periodically in the long-haul systems. The two successive segments are: ⅰ) of different chemical structures (x), or ⅱ) of different relative refractive index differences (Δn). High orders dispersion modes are considered. The obtained results are tabulated to simplify the design of optical links in ultra-wide wavelength division multiplexing (UWWDM) long-haul optical systems. The dispersion-free zones are investigated also in each case. Linear relationships are depicted to relate the design parameters of the successive elements, the wavelengths of the dispersion-free zones, and the slopes of the dispersion curves.