- Tower Semiconductor ($TSEM) and NewPhotonics have begun high-volume shipments of laser-integrated silicon photonics optical engines, with current production products supporting 800G and 1.6T. - The key technology is $TSEM's PH18DA SiPho platform, which heterogeneously integrates InP devices to combine lasers, SOAs, modulators, and photodetectors on a single PIC. - NewPhotonics' NPG102 uses a 200G-per-lane architecture for 800G and 1.6T PICs, targeting optical architectures ranging from FRO/LRO/LPO and XPO pluggables to NPO. - The more important next step is the 6.4T NPC505 chipset, a CPX-MSA-compliant NPO solution scheduled for volume shipment in 1H27, targeting both scale-out and scale-up AI interconnects. - $TSEM says NewPhotonics is the first customer to bring heterogeneous laser-integrated optical engines on PH18DA into high-volume production, although specific customers and shipment volumes were not disclosed. > The most important phrase here is “high-volume shipment.” This suggests $TSEM's silicon photonics platform has moved beyond PDKs, tape-outs, and prototypes into actual volume manufacturing of laser-integrated PICs. > Integrating the laser, SOA, modulator, and detector around a single PIC can reduce component count and optical-engine assembly complexity. As AI interconnects evolve from pluggables toward NPO and eventually CPO, the value of a highly integrated, scalable SiPho foundry platform could increase materially. > From an investment perspective, the key point is that $TSEM is increasingly becoming more than a legacy analog foundry and is beginning to establish itself as a merchant SiPho foundry tied directly to AI optical connectivity volume production. With 800G/1.6T already shipping and 6.4T NPO targeted for 1H27, the $TSEM SiPho story is gradually shifting from future optionality to a production ramp story.