Reduction of second-order intermodulation distortions using chirped fiber Bragg gratings with low group delay ripples for application to fiber-optic analog transmission

摘要

Reduction of second-order intermodulation distortions using chirped fiber Bragg gratings (CFBGs) as dispersion compensators is investigated for application to fiber-optic analog transmission. We investigate the effect of the group delay ripples of the CFBG on the second-order intermodulation distortions (IM2) for different modulation depths. Considering the relation of the spectrum width of optical signals and the ripple period of the CFBG, we found that the CFBG is fully effective to suppress IM2 in a high modulation depth regime. (C) 2008 Optical Society of America.