World’s Smallest High-Power DWDM Optical Transceiver

NEC Corporation has developed the world’s smallest optical transceivers, which support Dense Wavelength Division Multiplexing (DWDM) devices with a transmission speed of 2.5Gbps.

With its 13.8 (L) x 56.5 (W) x 8.5mm (D), cubic volume was reduced to one tenth that of conventional models. The new product contributes to the miniaturization of DWDM devices as it supports both transmitting and receiving functions. This newly developed transceiver also enables the provision of the world’s first model with optical power of 4 milliwatt, in addition to the standard model that has optical power of 1 milliwatt. It supports either long (1574-1610nm) or conventional (1530-1563nm) band.

NEC plans to commercialize a new device that is able to carry out transmission of 480km in early summer by using monolithic light sources of laser diodes and an electroabsorption optical modulator.

The spread of DWDM devices has been growing accompanied by an increase in the volume and speed of data transmission. Although DWDM devices were only conventionally used for long distance transmission, their range of use has recently expanded to the metro network. This miniaturization was accomplished by combining the transmitting and receiving functions through high density mounting and reducing cooling parts for low power consumption. High power output has been realized by strengthening the emission power of the laser diodes and increasing the coupling ratio of the optical connector parts.