SnapBack this was also mentioned in that news release 

"CWDM filters represent an industry first,” commented Dr. Suresh Venkatesan, Chairman & CEO. “With optical losses at a fraction of that of other materials, our waveguides and filters enable the fabrication, assembly and testing of integrated optical engines at wafer-scale, providing maximum flexibility across a broad range of applications, from  datacom to co-packaged optics.”