A wavelength routing device by using cyclic AWGs and tunable FBGs

Abstract

This paper presents a dense wavelength-division multiplexing (DWDM) routing device based on a pair of 1×N and N×1 cyclic array waveguide gratings (AWGs) and tunable fiber Bragg gratings (FBGs) to configure all channels in a dynamic network. With the AWG cyclic spectral routing rule, all the DWDM channels (e.g., more than 8 DWDM channels can be configured based on a pair of cyclic 1×8 and 8×1 AWGs) can be added and dropped by using the multiple tunable FBGs to reflect the channels that need to be dropped to the drop port as well as to reflect the local DWDM channels that are same as the drop wavelength channels to the output port. Three DWDM channels are demonstrated to verify that all the DWDM channels can be added and dropped in one pair of cyclic AWGs. The results show that the proposed DWDM routing device is feasible to use and offers more flexibility in all-optics dynamic networks.