High-Speed Transmission Of Coded Modulation Systems OTDM Technology Research

Nowadays, the great potential of fiber capacity has not yet been utilized on the research of communication. The rational use of the bandwidth and the transmission capacity in the signal system become the new challenge. All-optical communication transmission system is currently a hot topic of research, while the high-speed optical time division multiplexing system in the single channel must be the key link to solve the information capacity requirements effectively. In this paper, Optisystem which is optical communication simulation software for OTDM establish the corresponding simulation.In this paper I studied the optical time division multiplexing of the core issues, such as high-frequency ultrashort pulse light, time division multiplexing and demultiplexing and extracted clock signal, etc. There are all kinds of factors evaluation system, such as BER, eye Figure opening degree, receiver sensitivity, tolerance, and the nonlinear dispersion tolerance and so on. And I used the mathematical model to analysis the optical communication transmission system, the characteristic of the transmission parameters of the transmission link in the transmitting side and the receiving side for the quantitative analysis.then I modulated the RZ code modulation formats, the principle CSRZ code, RZ-DPSK and CSRZ-DPSK code yards of four contrasting pattern generator and generate spectra. Finally I studied the effects of high-speed OTDM systems of nonlinear effects in optical fiber transmission of signals.