News Intel, SK hynix, and NTT team up to put optical technology into logic chips in hopes of reducing power consumption by up to 40 percent

How much latency would photonics add? I'm imagining this is mainly going to be for CXL. If we get a fast memory tier in package and the large, expandable memory pool gets attached via CXL, perhaps the latency impact of switching to photonics will be minimal.