Core-cladding-like phosphor ceramics wafer excited with high power density blue laser diodes as an ultra-high luminance light source

https://www.eurekalert.org/news-releases/1094365

"increases light sources' luminance using phosphor material that both limits light spot expansion/ boosts maximum luminous flux, balancing trade-off between them... gel-casting optical fiber-like core-cladding phosphor ceramic green bodies with different core diameters, then sintered at 2023°K for 5 hours in vacuum maintained at 10⁻3 Pa, finally interface between core/ cladding tightly bonded/ interface devoid of porosity... control over light spot area by adjusting core dimensions... searchlights, night vision, projection displays"