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简单地推导了相位调制下的单音频率在传输光纤中其功率与光纤色散、光纤距离之间的关系,并介绍了在DWDM系统中可以利用相位调制法进行实时监测色散。此方法对于40GHz系统的色散实时监测提供了很好的参考方法。仿真结果表明,在未考虑光纤非线性效应的情况下有很高的精确性,当考虑非线性效应时,其传输距离会由于传输速率的影响而受到限制。
The relationship between the power, the fiber dispersion and the fiber distance of the monophonic frequency in the transmission fiber is simply deduced. It is also introduced that the phase modulation method can be used to monitor the dispersion in the DWDM system in real time. This method provides a good reference for the real-time monitoring of dispersion in 40GHz system. The simulation results show that there is high accuracy without considering the nonlinear effect of the fiber, and the transmission distance will be limited due to the influence of the transmission rate when the nonlinear effect is taken into account.