公开(公告)号：US20210396933A1

公开(公告)日：2021-12-23

申请号：US17289984

申请日：2018-10-30

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Sergio Mosti ,  Sergio Lanzone ,  Marco Assale ,  Chaudio D'Incà ,  Alberyto Deho

IPC分类号： G02B6/293 ,  H04B10/25 ,  G02B6/42

摘要： An optical add/drop device (100) comprising: a common port (102); an add port (106); a first wavelength selective optical filter (110) configured to: receive an optical signal at an add wavelength from the add port and transmit said optical signal at the add wavelength towards the common port; and receive optical signals from the common port and reflect optical signals not at the add wavelength; a second wavelength selective optical filter (114) configured to receive said optical signals from the common port reflected by the first wavelength selective optical filter and transmit an optical signal at a drop wavelength, different to the add wavelength; a drop port (116); and an optical waveguide (118) configured receive said optical signal at the drop wavelength transmitted by the second wavelength selective optical filter and route said optical signal to the drop port.