“…In order to meet the increasing bandwidth demand, wavelength-division multiplexing (WDM) [1] and dense wavelengthdivision multiplexing (DWDM) [2] systems are widely used, and the operating rate of the electronic devices can not meet the processing of the signaling optical data, so that the research and development of Optical Add-Drop Multiplexer (OADM) has become a hot topic [3,4] .…”