Laser light illuminant based on YAG: Ce phosphor ceramic with ultra-high luminance, stable output, and excellent heat dissipation

A hundred-watt level blue collimated laser is used to excite YAG: Ce phosphor ceramics to prepare a high-power white laser-based illuminant. A composite ceramic cooling device is prepared to reduce the operating temperature of YAG: Ce phosphor ceramics by using nano-silver to weld ceramics onto a copper block with a water-cooling device. Phosphor ceramics encapsulated with the above device can withstand the excitation of a 123 W blue laser, and its output luminous flux value reaches 14600 lm. The stable output time of the laser-based illuminant is over 30 min, and the operating temperature of the phosphor ceramic surface is only 270 °C. Compared with the non-cooling device package, the luminous flux of the laser-based illuminant composed of phosphor ceramics packaged with the above structure is increased by 252.8 %. The experimental results show that the composite ceramic cooling device can effectively reduce the operating temperature of phosphor ceramics which is an effective way to realize white laser-based illuminants over 10000 lm. •The Optical performance of phosphor ceramics with different packaging modes was examined.•A composite ceramic cooling device is prepared by using nano-silver to weld ceramics onto a copper block.•Phosphor ceramics encapsulated with the above device can withstand the excitation of 123W blue laser, andoutput 14600lm.•The maximum withstanding blue laser power of phosphor ceramic packaged with above structure increased from 35W to 123W.•Laser light illuminant based on YAG: Ce phosphor ceramic achieves stable output for more than 30min.