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在光纤WDM通信系统或WDM网络中，波长控制是十分必要的.本文讨论了使用法布里-珀洛（FP）谐振腔作为波长控制器件，在考虑频道间串扰的情况下，波长控制精度的计算理论，对一个频道间隔200GHz，16路信道，调制码率为2.488Gb／s的WDM系统的波长控制精度问题进行了计算和比较.
In optical fiber WDM communication system or WDM network, wavelength control is very necessary.This paper discusses the use of Fabry-Perot (FP) resonator as a wavelength control device, taking into account the case of crosstalk between channels, the wavelength control accuracy Computing theory, the wavelength control accuracy of a WDM system with a channel spacing of 200GHz, 16 channels and a modulation code rate of 2.488Gb / s is calculated and compared.