Christine Moreau

Dispersion-managed fiber with low chromatic dispersion slope

A dispersion-balanced fiber exhibiting a low chromatic dispersion slope (<0.015 ps/nm/sup 2//km at 1550 nm) was obtained by longitudinally changing the radial dimension of a refractive index profile. We report theoretical and experimental results and trade-offs between effective-area and cable ability aspects.

Effect of band location on characteristics of distributed Raman amplification

The impact of attenuation spectrum and effective area of link fiber has been experimentally and numerically assessed regarding the required pump power and effective noise figure for the S-band compared to C-band and XL-bands. Compared to the C-band and XL-band, it is shown that 15% more pump power is required in the S-band compared to the C-band while 1 dB more is observed for the effective noise figure compared to the C-band. The XL-band offers better a noise figure (2 dB lower than in the S-band) with similar power performance. Indeed, the increase of effective area and decrease of material Raman coefficient with wavelength reduces the benefit brought by a lower attenuation coefficient. However, attenuation at the pump wavelength is paramount for the determination of the best noise figure. Installed fiber characteristics, particularly concerning possible bending loss in the XL-band, will finally determine the best suited solution.

Highly Erbium-Doped Fibers Characterization and Modeling for Erbium Doped Fiber Amplifiers in WDM Regime

Simple experiments are used to determine ion-pairs percentage and macroscopic homogeneous upconversion in highly erbium-doped fibers. Using these parameters in a Giles-based model enable to predict Optical-Power-Conversion-Efficiency of WDM-EDFAs with a fair agreement.