Research On The Technology Of Coherent Detection About 100G DP-QPSK Optical Signal And Applied To Engineering

With the rapid development of optical communication technology,optical transmission network is moving towards higher speed.Dual Polarization Quadrature Phase Shift Keying optical signal modulation,namely DP-QPSK optical signal modulation,because of its high spectrum efficiency and dispersion tolerance,and others good performance,it has become the main modulation in 100 G optical communication.100 G DP-QPSK optical signal coherent detection is very hard applied to engineering,this paper base on the project to compete the 100 G DP-QPSK optical signal coherent detection module that according to researching 100 G optical signal coherent detection technology and using the data from our team experience that success to complete 2.5G,10 G,40G optical transmission system.Now the project is in the testing phase.The main work is listed as follows:(1)Making a research about correlation technology,DP-QPSK modulation,coherent detection,and discussing 100 G digital signal process technology,all these theories are prepared for project;(2)Designing the hardware,and discussing the details about power design,clock design,and others,especially radio frequency ADC clock design.According to the designs to finish the module;(3)Making a control design that base on the FPGA after hardware complete,and discussing the details about ICR,ITLA,DSP ASIC and verify the program;(4)Making the electric signal loop testing for the module base on the lab equipment and designing the line side loop testing for next step work.