光学学报, 2009, 29 (s1): 169, 网络出版: 2009-06-25
LED白光源用Ce3+∶YAG单晶光纤制备与特性
Growth and Characteristics of Ce3+ Ions-Doped YAG Single-Crystal Optical Fibers for LED White Light Sources
LED白光源 单晶光纤 荧光材料 LED white light sources single-crystal fiber fluorescent materials Ce3+∶YAG Ce3+∶YAG
摘要
采用激光加热基座法从粉末源棒直接制备LED白光源用Ce3+∶YAG单晶光纤荧光材料。通过单次或多次生长可以得到直径150~1000 μm各种Ce3+离子掺杂YAG单晶光纤。实验测量了所制备荧光光纤在波长465 nm LED激发下的荧光光谱, 结果表明在550 nm附近存在宽带强荧光辐射。利用所制备Ce3+∶YAG单晶光纤荧光材料与蓝色LED抽运光合成产生高效LED光纤白光源, 所得光纤白光源色温5881 K, 色坐标x=0.310, y=0.350, 显色指数为75.0, 表明光源输出光品质良好。由于Ce3+∶YAG单晶光纤既有晶体材料光学特性又有光波导的特点, 使得它比通常的Ce3+∶YAG粉体荧光材料具有较高的LED抽运效率和荧光收集效率, 有望用于未来大功率光纤白光源。
Abstract
Ce3+∶YAG single-crystal optical fiber fluorescent materials for LED white light sources have been grown directly from powder source rod by laser heated pedestal growth method. Various diameters Ce3+∶YAG single crystal optical fibers from 150 μm to 1000 μm are available by single-step and/or multi-step process. Fluorescence spectrum of the grown optical fiber materials under 465 nm LED pumping is measured and results show strong wide band fluorescence emission near 550 nm wavelength. High efficient LED white light sources can be got by combining blue LED and grown Ce3+∶YAG single-crystal optical fiber. The developed optical fiber white light sources show good white light quality with the 5881 K of the color temperature and the CIE color coordinates (x=0.310, y=0.350) and 75 of the CRI. Combined with the good qualities of optical crystal materials and optical waveguide properties, the grown Ce3+∶YAG single-crystal optical fibers have a high efficiency of LED pump and fluorescence collection prior to general powder Ce3+∶YAG fluorescent materials. It can be used for high power LED white light sources in future.
叶林华, 宋丽, 李刚, 刘相芳. LED白光源用Ce3+∶YAG单晶光纤制备与特性[J]. 光学学报, 2009, 29(s1): 169. Ye Linhua, Song Li, Li Gang, Liu Xiangfang. Growth and Characteristics of Ce3+ Ions-Doped YAG Single-Crystal Optical Fibers for LED White Light Sources[J]. Acta Optica Sinica, 2009, 29(s1): 169.