Research On The Multi-wavelength Regeneration And Format Conversion Of Advanced Modulation Format Signal

In recent years,cutting-edge technologies such as artificial intelligence and cloud computing have developed rapidly.Based on the new applications such as mobile Internet and Internet of Things,new industries and new services are emerging rapidly.The Internet has infiltrated all aspects of our life and work.Every day,we generate a lot of data,making the original information rate of electrical signals can not meet the user demand growth and the bandwidth demand for business growth.Using advanced modulation format to transmit information,not only can increase the transmission capacity of optical communication system,but also improve the system's spectral efficiency.With the wide application of advanced modulation formats,signal processing of advanced modulation format signals is needed at optical nodes to meet diverse application.Therefore,the significance of the processing of advanced modulation signals is obvious.This thesis aims at multi-wavelength regeneration and format conversion of advanced modulation formats.The main work and research are as follows:1)Two kinds of solutions are proposed for decrease the crosstalk occured in four channels QPSK phase sensitive amplification.The first one is to use one mode process to replace the original one mode process.The second one is to use the modulator to replace the original nonlinear media during the process of interference.Both options reduce crosstalk occurring in the process of interference.2)Aiming at the problem that the converted signal can not be obtained at the same time in the 8PSK format conversion process,a coupler is used as the interference medium.Different from the original conversion scheme,the proposed scheme not only simplifies the device but also obtains the converted signal simultaneously.The converted signal has the same wavelength as the original wavelength.