Title :
Modulation instability in long amplified links with strong dispersion compensation
Author :
Ciaramella, Ernesto ; Tamburrini, Mario
Author_Institution :
Fondazione Ugo Bordoni, Rome, Italy
Abstract :
Modulation instability is analytically investigated in conventional fiber links exploiting periodic chromatic dispersion compensation and optical amplification. The exact solution of the propagation equation for low perturbations shows that, when linear dispersion compensators are used, the gain spectrum may be determined by just averaging the span dispersion. However if almost complete compensation is applied in each amplified span, the peak gain and frequency detuning largely deviate from this behavior. Moreover, in this case the instability does not significantly amplify the amplitude noise of the signal pump. This effect has a high potential impact on optical transmission system design.
Keywords :
compensation; laser noise; optical fibre amplifiers; optical fibre dispersion; optical fibre networks; optical fibre theory; optical pumping; perturbation theory; amplitude noise; exact solution; frequency detuning; gain spectrum; high potential impact; linear dispersion compensators; long amplified links; low perturbations; modulation instability; optical amplification; optical transmission system design; peak gain; periodic chromatic dispersion compensation; propagation equation; signal pump; span dispersion averaging; strong dispersion compensation; Chromatic dispersion; Fiber nonlinear optics; Nonlinear optics; Optical crosstalk; Optical fiber dispersion; Optical modulation; Optical noise; Optical propagation; Optical pumping; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
