| .A method of simulating intensity modulation-direct detection WDM systems[J].Optoelectronics Letters,2005,1(1):57-60 |
| A method of simulating intensity modulation-direct detection WDM systems |
| HUANG Jing YAO Jian-quan LI En-bang |
| [1]School of Precision Instruments and Optoelectronics Engineering, Tianjin University, TianJin 300072, China [2]Applied Physics Department, South China University of Technology, Guangzhou 510640, China [3]School of Electrical, Computer and Telecommunications Engineering, Faculty of Infonnatics, University of Wollongong, NSW 2522, Australia |
| Abstract: |
| In the simulation of Intensity Modulation-Direct Detection WDM Systems, when the dispersion and nonlinear effects play equally
important roles, the intensity fluctuation caused by cross-phase modulation may be overestimated as a result of the improper
step size. Therefore, the step size in numerical simulation should be selected to suppress false XPM intensity modulation
(keep it much less than signal power). According to this criterion, the step size is variable along the fiber. For a WDM system,
the step size depends on the channel separation. Different type of transmission fiber has different step size. In the split-step
Fourier method, this criterion can reduce simulation time, and when the step size is bigger than 100 meters, the simulation
accuracy can also be improved.
This work is supported by Nation Nature Science Foundation of China (50278001) and the Science & Technology Cooperation Foundation
of Nankai University, the Ministry of Education. |
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