Optically linearized modulators: chirp control for low-distortion analog transmission

Reduction in timing jitter by chirp selection for externally modulated return to zero optical soliton pulse at 10 Gb/s

“…Also none of the above papers laid stress on timing jitter which is one of the most important factor in optimizing the performance of optical communication systems. In this paper, the work reported in [11,19,24] has been further extended for chirp selection of externally modulated RZ soliton at 10 Gb/s for fiber optical communication system with repeated amplification after every 60 km and with dispersion compensation.…”

“…It is also shown that an increase of composite-secondorder (CSO) distortion by increasing fiber length can occur in analog transmission systems using optically linearized MZ modulators and that degradation is due to generation of chirp in the modulator [19]. A novel modulator design where chirp is greatly reduced while preserving excellent linearity was proposed.…”

Suppression of intermodulation distortion in CATV system using Dual Parallel Mach-Zehnder Modulator

“…They improve the dynamic range of the input RF signals and keep the carrier to intermodulation distortion within the required limits. Simple models of a two stage modulator propose for increased linearity in [7][8]. In [8], the splitting ratios of input optical power and the input RF power values obtain using trail and error method and analysis the IMD performance up to sixteen channels.…”