Adhesive-free fiber-to-chip connection via direct laser welding for integrated photonics

https://techxplore.com/news/2022-07-adhesive-free-fiber-to-chip-laser-welding-photonics.html

"coupling welded-fibers PICs integrated waveguides... deformation and cracks during cooling. The solution of the photonics experts was to preheat the substrate evenly by means of a separate, individually adjustable laser, so that the melting phase of the fiber and the substrate is achieved simultaneously... thermal process monitoring 1300°C, positioning system accurate 1 µm, image recognition processes and control software"