Abstract
We investigate dual concentric core and microstructure fiber geometries for dispersion compensation. Dispersion values as large as -59 000 ps/(nm km) are achieved, over a broad wavelength range with full width at half maximum exceeding 100 nm. The trade-off between large dispersion and mode area is studied. Geometries with an effective mode area of 30 microm2 and dispersion -19 000 ps/(nm km) and 80 microm2 with -1600 ps/(nm km) are proposed.
Highlights
The fibers that have been installed for long-haul data transmission were designed for wavelengths around 1300 nm
Mode area 80 μm 2 comparable to that of the standard optical fiber has dispersion −1600 ps/(nm km). This type of large mode area dispersion compensating fiber can be used for dispersion compensation of high power pulses or for simultaneous amplification and dispersion compensation by doping the fiber with, for example, Erbium
All the geometries investigated in this paper have Full width at half maximum (FWHM) wider than 100 nm
Summary
The fibers that have been installed for long-haul data transmission were designed for wavelengths around 1300 nm. In photonic crystal fibers dispersion values up until −18000 ps/(nm km) [6] have been predicted by numerical considerations Another type of fiber having a large dispersion is dual-core fiber [8, 9, 10, 11, 12]. Mode area 80 μm 2 comparable to that of the standard optical fiber has dispersion −1600 ps/(nm km) This type of large mode area dispersion compensating fiber can be used for dispersion compensation of high power pulses or for simultaneous amplification and dispersion compensation by doping the fiber with, for example, Erbium. Another issue to be considered is the wavelength range of high dispersion. All the geometries investigated in this paper have FWHM wider than 100 nm
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