Research On All-optical Multicast Technology Based On Stimulated Raman Scattering (SRS) In Optical Fiber

With the advent of the information age, the requirements of the network multicastservices are increasingly growing, thus the multicast technology becomes one of the keytechnologies in intelligent networks of the next generation. Because the existingoptical-electrical-optical conversion method is complicated and high cost, its highestconversion efficiency is limited by the “electronic bottleneck”, the all-optical multicasthas become one of the hot research fields.Firstly, the development and the research significance of all-optical multicasttechnology are introduced in this dissertation, then the principles and characteristics ofseveral main all-optical multicast technologies based on the cross-gain modulation,cross-phase modulation and four wave mixing in optical fiber are summarized. Secondly,according to the transient model of single-mode silica fiber in unidirectional wavelengthdivision multiplexed (WDM) of an optical communication system and using theprinciple of the signal light as a pump source to amplify multiple continuous probelights, the theoretical model of all-optical multicast based on Stimulated RamanScattering (SRS) in optical fiber is constructed, which could make the informationcarried by the signal light be converted to the multiple continuous probe lights in eachpath; Then we combine silica fiber with phosphorus-doped silica fiber to make outputoptical-power smooth in each path.Finally, Optisystem software is used to build simulation scenario and verify thefeasibility of the theoretical model. Several factors which can influence the multicastperformance are discussed. This study made in this dissertation will provide a valuablereference for the realization of this all-optical multicast device.