> Curious how they phase synchronize so many light emitters but the full paper looks like $$ I sent a request on their researchgate: https://www.researchgate.n

> Curious how they phase synchronize so many light emitters but the full paper looks like $$ I sent a request on their researchgate: https://www.researchgate.net/publication/339277200_Chip-scale_Blue_Light_Phased_Array https://www.researchgate.net/publication/339277200_Chip-scal... There's only a single light emitter, a fiber laser that feeds the device. That's split in treelike fashion. At each branching part, there's an optical resonator that ensures light is fed evenly to each branch. Each branch has its own phase delay, which requires a bit of software tuning to account for variations.