期刊
OPTICAL MATERIALS EXPRESS
卷 8, 期 9, 页码 2760-2767出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.8.002760
关键词
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资金
- National Key Research and Development Program of China [2016YFB0402001]
- National Natural Science Foundation of China (NSFC) [51502308]
- Science and Technology Major Project of Ningbo Municipality [2017C110028]
Solid-state laser lighting is an emerging technology, whereby high-brightness white light can be generated using blue laser diodes combined with a yellow-emitting phosphor. In this study, Ce:YAG transparent ceramic wafers with different cerium concentrations and thicknesses are prepared and their optical characteristics are measured. A transmission mode is used, wherein the phosphor ceramic is fixed onto an oxygen-free copper sink, whose temperature is accurately controlled, and excited using the blue laser diode. The recorded spectrum shows that blue laser light is completely converted to yellow light with a wavelength of 565 nm and width of 200 nm. Moreover, with varied temperatures of 10-80 degrees C, the luminous flux, spectrum, and color coordinates exhibit relatively stable. More importantly, the luminous flux is highest (2690 lm) when irradiated by a 19.5-W blue laser (with a center wavelength of 454 nm) for a Ce3+ dopant concentration of 0.5 mol% and a Ce:YAG thickness of 1.6 mm. Based on these results, the Ce:YAG transparent ceramic can be used as a potential phosphor material in applications of high-power solid-state laser lighting and laser display. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
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