Ye Bo, Chen Dehua, Yang Zhuang. Realization of WB-based ROADM and analysis of its optical path OSNR penalty[J]. 2008,(4):11-13. DOI: 10.13756/j.gtxyj.2008.04.013.
this article discusses in detail the advantages of ROADM device
presents a realization scheme for Wavelength Blocker(WB)-based ROADM and measures the maximum OSNR penalty of this ROADM node device in relation to its practical applications.The results indicate that this device meets the requirements in applications.