激光白光光源及其光学系统解析

为进一步推广激光白光光源在汽车大灯、投影、背光显示等领域的应用，对激光白光光源的合成方式进行了介绍，从泵浦源、光转换材料、光学系统3个方面详细解析了激光照明系统的关键组成要素。通过理论分析，计算出了激光照明系统中最高理论光光转换效率为498 lm/W。然而，受困于技术和工艺难题，目前激光照明系统的最终效率仅约为17%。随后，在对适用于高亮度激光照明系统的光转换材料进行总结后，创新性地利用一种棒形(长度> 10 mm)YAG陶瓷(Ce < 0.1 at%)来匹配高流明密度蓝光；并从光学设计的角度，提出一种光转换材料的“透镜型”结构来综合提升光效。最后，结合专利分布情况，对激光照明系统在激光显示、可见光通信等领域的前景与应用进行了展望。

Laser white light source of its optical system analysis

To further promote the application of laser white light source in the fields of automobile headlights, projection and backlight, the synthesis methods of laser white light source were introduced. Besides, its key components were detailedly analyzed from three aspects: pump source, light conversion material and optical system. Through the theoretical analysis, the highest theoretical value of light conversion efficiency in the laser illumination system was 498 lm/W. However, some technical and process problems resulted in that its final efficiency was only 17%. Then, a rod-shaped (length > 10 mm) YAG ceramic (Ce < 0.1 at %) was innovatively proposed to accommodate the high lumen blue light based the summary of the light-conversion materials for high-lumen-density laser lighting system. In addition, from the viewpoint of optical design, a new lens type structure of light-conversion materials was employed to totally enhance the efficiency. Finally, after considering the distribution of related patents, the prospects and applications of laser lighting system were forecasted in the fields of laser display, visible-light communication and so on.