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Conventional copper electronic interconnect faces fundamental obstacles that prevent it from meeting increasing bandwidth demands. Optical PCB technology had been researched for several years, but significant issues remain before it can be commercialized. The HDPUG Optoelectronics project set out to demonstrate that optical waveguides incorporated within a backplane could benefit the system's interconnect topology. HDPUG facilitator Jack Fisher explains that a demonstrator has now been built and is currently under test at a number of leading OEMs.