Ultrafast optical switching can save overwhelmed datacenters

https://phys.org/news/2021-10-ultrafast-optical-overwhelmed-datacenters.html

"A particularly promising OCS [optical circuit switches] architecture is wavelength switching where different servers are connected using different colors (wavelengths) of light leading to flatter network architecture and limiting the need for electrical switches and optical transceivers... using a chip-based soliton comb laser and a completely passive diffraction grating device"

Related: A traffic light for light-on-a-chip

https://phys.org/news/2021-10-traffic-light-on-a-chip.html