Powerful, energy-efficient, compact, precise, single chip multi-color lasers

https://www.engineering.columbia.edu/about/news/powerful-and-precise-multi-color-lasers-now-fit-single-chip

"microcomb source spectrally separates comb lines... enables sending dozens of clean, high-power data stream channels simultaneously... no large/ expensive lasers/ amplifiers... locking mechanism purifies powerful but noisy multimode laser diode, relying on silicon photonics to reshape/ clean up laser’s output, enabling high coherence... wavelength-division multiplexing: dozens of beams in parallel through same fiber... portable sensors, ultra-precise optical clocks, compact quantum devices, LiDAR, data centers"

Related: Programmable optical chip merges photons to change color
https://phys.org/news/2025-10-programmable-optical-chip-merges-photons.html