High-power fiber lasers emerge as a pioneering technology

https://phys.org/news/2023-11-high-power-fiber-lasers-emerge-technology.html

"Brillouin-scattering laser threshold power boosted 3 - 5X while still focused on target... input wavefront shaping modulates relative phases of multimode optical fiber modes, so that interference produces diffraction-limited spot near fiber output, collimated by lens... defense against low-cost drones, remote detection of molecules, gravitational wave measurement"