
																
																	Bi-directional ROADM with one pair of NxN cyclic-AWGs for over N wavelength channels configuration
																
																
																
															Keywords: Reconfigurable optical add-drop multiplexer (ROADM); Arrayed waveguide gratings (AWG); Fiber Bragg gratings (FBG); Dense wavelength division multiplexing (DWDM); generalized multi-protocol label switching (GMPLS);